Understanding Nutrition 12th Edition By Whitney – Test Bank

Complete Test Bank With Answers

 

 

Sample Questions Posted Below

 

Chapter 5 – The Lipids: Triglycerides, Phospholipids, and Sterols

An. Page(s)/difficulty K = knowledge-level, A = application level

Multiple Choice

Questions for Section 5.0 Introduction

c 133(K) 01. Approximately what percentage of the lipids in foods are triglycerides?

a. 5

b. 30

c. 95

d. 100

02. In which form are most dietary lipids found?

a. Sterols

b. Glycerols

c. Triglycerides

d. Monoglycerides

03. What percentage of stored body fat is in the form of triglycerides?

a. 2

b. 50

c. 78

d. 99

04. Lipids that are solid at room temperature are known as

a. oils.

b. fats.

c. omegas.

d. glycerols.

05. Lipids that are liquid at room temperature are known as

a. oils.

b. fats.

c. omegas.

d. glycerols.

Questions for Section 5.1 The Chemist’s View of Fatty Acids and Triglycerides

c 133(K) 06. What is the chemical composition of fats?

a. Hexose polymers

b. Glycogen granules

c. Fatty acids and glycerol

d. Combinations of long chain fatty acids

07. A compound composed of carbon, hydrogen, and oxygen with 3 fatty acids attached to a

molecule of glycerol would be known as a

a. diglyceride.

b. triglyceride.

c. phospholipid.

d. monoglyceride.

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c 133(K) a 134(K) 08. What compound is composed of 3 fatty acids and glycerol?

a. Steroid

b. Lecithin

c. Triglyceride

d. Monoglyceride

09. How many double bonds are present in stearic acid?

a. 0

b. 1

c. 2

d. 3

a 134(K) a 134(K) 10. Which of the following is a property of dietary lipids?

a. b. c. d. Omega-3 fatty acids are always unsaturated

Lipids that are solid at room temperature are classified as oils

The fatty acids in triglycerides may be of chain length 2 to 25 carbons

The most common fatty acid chain length in triglycerides is 10 carbons

11. What is the simplest 18-carbon fatty acid?

a. Stearic acid

b. Linoleic acid

c. Palmitic acid

d. Linolenic acid

c 134(K) a 134(K) 12. Which of the following represents a chief source of short-chain and medium-chain fatty

acids?

a. Fish

b. Eggs

c. Dairy

d. Soybeans

13. How many hydrogen atoms are attached to each carbon adjacent to a double bond?

a. 1

b. 2

c. 4

d. 6

b 134(K) 14. What is the simplest fatty acid found in the diet?

a. Oleic acid

b. Acetic acid

c. Linoleic acid

d. Palmitic acid

b 134(K) b 134(K) 15. Lipids differ in their degree of saturation or unsaturation due to their number of

a. amino acids.

b. double bonds.

c. saccharide units.

d. peptide linkages.

16. Which of the following is a common dietary saturated fatty acid?

a. Oleic acid

b. Stearic acid

c. Linolenic acid

d. Arachidonic acid

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b 134(K) d 134(A) c 135(K) b 135(K) b 135(A) d 135(K) c 135(A) c 136(K) 17. Approximately how many carbons are contained in a medium-chain fatty acid?

a. 2-4

b. 6-10

c. 12-22

d. 24-26

18. Which of the following is a common source of medium-chain fatty acids?

a. Fish oils

b. Beef products

c. Vegetable oils

d. Dairy products

19. Which of the following describes a fatty acid that has one double bond?

a. Saturated

b. Hydrogenated

c. Monounsaturated

d. Polyunsaturated

20. What type of fatty acid is found in high amounts in olive oil?

a. Saturated

b. Monounsaturated

c. Polyunsaturated

d. Partially hydrogenated

21. Which one of the following compounds is missing 4 or more hydrogen atoms?

a. Monounsaturated fatty acid

b. Polyunsaturated fatty acid

c. Long-chain saturated fatty acid

d. Short-chain saturated fatty acid

22. Which of the following is a polyunsaturated fatty acid in foods?

a. Oleic acid

b. Acetic acid

c. Stearic acid

d. Linoleic acid

23. A person wishing to increase consumption of polyunsaturated fats should choose

a. coconut oil.

b. beef products.

c. vegetable oils.

d. dairy products.

24. An omega-3 fatty acid has its first double bond on the

a. b. c. d. third carbon from the acid end.

first 3 carbons from the acid end.

third carbon from the methyl end.

first 3 carbons from the methyl end.

a 136(K) 25. What is a triacylglyceride?

a. A triglyceride

b. A phospholipid

c. A partially hydrolyzed lipid

d. A lipid found only in cold-water fish

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c 136(A) 26. The easiest way to increase intake of oleic acid is to consume more

a. lard oil.

b. corn oil.

c. olive oil.

d. safflower oil.

c 136(A) 27. A triglyceride always contains 3

a. carbons.

b. glycerols.

c. fatty acids.

d. double bonds.

a 136-137(A) c 137(K) b 137(A) d 137(A) a 137(A) b 137(A) 28. Which of the following is a feature of polyunsaturated fats?

a. Low melting point

b. High melting point

c. Solid at room temperature

d. Solid at refrigerator temperature

29. Which of the following is known as a tropical oil?

a. Flaxseed oil

b. Safflower oil

c. Cocoa butter

d. Conjugated linoleic acid

30. Which of the following is a factor that determines the hardness of a fat at a given

temperature?

a. Origin of the fat

b. Degree of saturation

c. Number of acid groups

d. Number of oxygen atoms

31. Which of the following sources would yield the softest lipids at room temperature?

a. Lard

b. Beef

c. Pork

d. Safflower

32. A major cause of rancidity of lipids in foods is exposure to

a. heat and oxygen.

b. fluorescent lighting.

c. freezer temperatures.

d. enrichment additives.

33. Which of the following structural features of fatty acids determines their susceptibility to

spoilage by oxygen?

a. Chain length

b. Number of double bonds

c. Position of first saturated bond

d. Size of adjacent fatty acids on the triglyceride molecule

c 137(K) 34. Which of the following is a characteristic of lipids?

a. b. c. d. A quick way to spoil fats is by exposure to carbon dioxide

Typically, the shorter the carbon chain, the firmer the fat at 75°

Corn oil and sunflower are more prone to spoilage than palm kernel oil

Palm oil and coconut oil are very liquid due to their longer carbon chains

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c 137-138(A) d 137-138(A) d 137-138(A) d 138(A) d 138(K) b 138(A) d 138(A) d 138(A) 35. When stored at room temperature in loosely capped containers, which of the following

dietary lipids would turn rancid in the shortest time?

a. Lard

b. Peanut oil

c. Soybean oil

d. Coconut oil

36. Which of the following would be least effective at preventing oxidation of the

polyunsaturated fatty acids in processed foods?

a. Refrigeration

b. Addition of BHT

c. Partial hydrogenation

d. Addition of phosphorus

37. All of the following are methods used by food processors to stabilize the lipids in food

products except

a. refrigeration.

b. hydrogenation.

c. tightly sealed packaging.

d. addition of oxidizing chemicals.

38. Characteristics of hydrogenated oils include all of the following except

a. b. c. d. they are stored in adipose tissue.

they lower HDL and raise LDL cholesterol in the body.

some of their fatty acids change shape from cis to trans.

products containing them become rancid sooner, contributing to a shorter shelf life.

39. Which of the following has the highest percentage of its fat in saturated form?

a. Butter

b. Walnut oil

c. Beef tallow

d. Coconut oil

40. Which of the following has the highest percentage of its fat in polyunsaturated form?

a. Butter

b. Corn oil

c. Beef tallow

d. Coconut oil

41. Which of the following characteristics is shared by olive oil and canola oil?

a. b. c. d. Neither is liquid at room temperature

Neither contains saturated fatty acids

Both contain high levels of polyunsaturated fatty acids

Both contain high levels of monounsaturated fatty acids

42. Which of the following provides abundant amounts of omega-3 fatty acids?

a. Palm oil

b. Walnut oil

c. Soybean oil

d. Flaxseed oil

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a 138(A) 43. The food industry often carries out the process of hydrogenation on which of the

following lipids?

a. Corn oil

b. Olive oil

c. Beef tallow

d. Coconut oil

a 138(K) 44. Which of the following is considered a major source of polyunsaturated fat?

a. Corn oil

b. Palm oil

c. Peanut oil

d. Chicken fat

d 138(A) 45. Which of the following lipids contain(s) saturated fat?

a. Butter only

b. Soybean oil only

c. Cottonseed oil only

d. Butter, cottonseed oil, and soybean oil

a 138(A) 46. All of the following are rich sources of polyunsaturated fatty acids except

a. palm oil.

b. fish oils.

c. soybean oil.

d. safflower oil.

b 138-139(A) 47. In the process of fat hydrogenation, hydrogen atoms are added to which part of the

molecule?

a. Oxygen

b. Carbon

c. Glycerol

d. Other hydrogens

c 139(A) 48. What is a conjugated linoleic acid?

a. b. c. A type of cis-fatty acid

A partially hydrogenated omega-6 lipid

A fatty acid with the chemical make-up of linoleic acid but with a different

configuration

d. A fatty acid resulting from the partial hydrolysis of dietary phospholipids in the

intestinal tract

a 139(A) 49. Oil that is partially hydrogenated sometimes changes one or more of its double bond

configurations from

a. cis to trans.

b. solid to liquid.

c. covalent to ionic.

d. saturated to unsaturated.

d 139(K) 50. Which of the following is descriptive of fatty acid configuration?

a. b. c. d. A cis-fatty acid has an extended, linear formation

A trans-fatty acid has a folded, U-shape formation

Trans-fatty acids are made only from polyunsaturated fats

Naturally occurring trans-fatty acids are found in dairy products

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d 139(K) 51. Which of the following describes a feature of cis-fatty acids and trans-fatty acids?

a. b. c. In nature, most double bonds are trans

Hydrogenation converts trans-fatty acids to cis-fatty acids

The conversion of cis-fatty acids to trans-fatty acids is inhibited by the presence of

antioxidants

d. In the body, trans-fatty acids are metabolized more like saturated fats than like

unsaturated fats

Questions for Section 5.2 The Chemist’s View of Phospholipids and Sterols

b 140(K) 52. Which of the following is a feature of phospholipids?

a. Resistant to digestion

b. Soluble in both water and fat

c. Highly susceptible to oxidation

d. Found naturally only in animal foods

d 140(K) 53. The composition of lecithin could include all of the following except

a. choline.

b. phosphate.

c. fatty acids.

d magnesium.

d 140(K) 54. What type of compound is lecithin?

a. Bile salt

b. Glycolipid

c. Lipoprotein

d. Phospholipid

d 140(A) 55. What is the usual fate of dietary lecithin?

a. b. c. d. Unabsorbed and passes out in the feces

Absorbed intact and incorporated into tissues

Absorbed intact and broken down by the liver

Hydrolyzed by the intestinal enzyme lecithinase

a 140(K) 56. Which of the following is a feature of choline?

a. b. c. d. It is a part of lecithin

It is a type of cis-fatty acid

It is a type of trans-fatty acid

It is attached to omega-3 fatty acids

a 140(K) 57. A characteristic of lecithin supplements is they

a. b. c. d. are mostly hydrolyzed in the intestine.

contribute small amounts of magnesium.

have an energy content of 4 kcalories per gram.

contribute large amounts of omega-3 fatty acids.

d 140(K) 58. Which of the following is not a feature of lecithin?

a. Widespread in foods

b. Found in cell membranes

c. Manufactured by the body

d. Dietary supplements inhibit fat absorption

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d 140(A) c 140(A) d 140-141(A) c 140;143(A) c 141(K) c 141(K) c 141(A) c 141(A) b 141(K) 59. How much energy is contributed by one gram of lecithin in a dietary supplement?

a. 0 kcal

b. 4 kcal

c. 7 kcal

d. 9 kcal

60. What is the approximate energy value of one teaspoon of liquid lecithin supplement?

a. 0 kcal

b. 2 kcal

c. 45 kcal

d. 200 kcal

61. Which of the following characteristics are shared by cholesterol and lecithin?

a. Both are sterols

b. Both are phospholipids

c. Both are essential nutrients

d. Both are synthesized in the body

62. Each of the following may act as an emulsifier in the intestinal tract except

a. lecithin.

b. bile acids.

c. pancreatic lipase.

d. bile phospholipids.

63. What is the major sterol in the diet?

a. Palm oil

b. Lecithin

c. Cholesterol

d. Arachidonic acid

64. About how much cholesterol is synthesized by the liver every day?

a. None

b. A few mg

c. Less than 300 mg

d. At least 800 mg

65. Which of the following foods contains cholesterol?

a. Corn

b. Olives

c. Roasted turkey

d. Roasted peanuts

66. What is the major source of “good” cholesterol?

a. Fatty fish

b. Fatty meat

c. Endogenous synthesis

d. Monounsaturated and polyunsaturated fatty acids

67. A common feature of the plant sterols is they

a. b. c. d. raise LDL and lower HDL.

inhibit absorption of dietary cholesterol.

inhibit absorption of “bad” cholesterol.

enhance absorption of omega-3 fatty acids.

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a 141(A) a 141(K) a 141(K) b 141(K) a 141(K) b 141(K) 68. Which of the following cannot be found in plants?

a. Cholesterol

b. Triglycerides

c. Essential fatty acids

d. Nonessential fatty acids

69. Which of the following is a feature of cholesterol?

a. Synthesized by the body

b. No relation to heart disease

c. Recommended intake is zero

d. No function in the human body

70. Which of the following is a feature of cholesterol?

a. b. c. d. Only about 10% of the body’s total cholesterol is extracellular

“Bad” cholesterol is a form of cholesterol found in plant foods

“Good” cholesterol is a form of cholesterol found in plant foods

Exogenous cholesterol absorption is reduced by lecithin supplements

71. Which of the following is a characteristic of cholesterol?

a. b. c. d. It is absorbed directly into the blood

It is a precursor for bile and vitamin D synthesis

It is not formed in the body when provided by the diet

It is found in abundance in tropical fats such as palm oil

72. Which of the following is a feature of cholesterol?

a. b. c. d. Its Daily Value is 300 mg

Its structure is similar to that of lecithin

Most of the body’s cholesterol is found circulating in the bloodstream

The amount consumed in the diet usually exceeds the amount synthesized in the

body

73. All of the following compounds may be synthesized from cholesterol except

a. bile.

b. glucose.

c. vitamin D.

d. sex hormones.

c 141-142(A) 74. Which of the following is not a destination for cholesterol?

a. Synthesized into bile

b. Excreted in the feces

c. Accumulates on walls of veins

d. Accumulates on walls of arteries

Questions for Section 5.3 Digestion, Absorption, and Transport of Lipids

a 142(K) 75. What term may be used to describe a substance that is hydrophobic?

a. Lipophilic

b. Lipophobic

c. Glycerophilic

d. Glycerophobic

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c 143(K) 76. Which of the following is characteristic of the lipase enzymes?

a. b. c. d. Gastric lipase plays a significant role in fat digestion in adults

Intestinal mucosal lipase is responsible for most dietary fat digestion

Salivary gland lipase (lingual lipase) plays an active role in fat digestion in infants

Pancreatic lipase hydrolyzes most dietary triglycerides completely to glycerol and

free fatty acids

c 143(K) 77. Which of the following is not a feature of the bile acids?

a. Stored in the gallbladder

b. Synthesized from cholesterol

c. Manufactured by the gallbladder

d. Released into the small intestine whenever fat is present

c 143(K) 78. In the digestion of fats, emulsifiers function as

a. enzymes.

b. hormones.

c. detergents.

d. chylomicrons.

c 143-144(K) 79. What part of the gastrointestinal tract is the predominant site of dietary fat hydrolysis?

a. Mouth

b. Stomach

c. Small intestine

d. Large intestine

b 144(K) 80. Chylomicrons are synthesized within the

a. liver.

b. intestinal cells.

c. lymphatic system.

d. storage compartment of plant seeds.

d 144(A) 81. How is soluble fiber in the diet thought to help lower blood cholesterol level?

a. b. c. d. It denatures cholesterol in the stomach

It hydrolyzes cholesterol in the intestinal tract

It traps cholesterol in the intestinal tract and thus inhibits its absorption

It enhances excretion of bile leading to increased cholesterol turnover

a 144(K) 82. Bile is known to assist in the absorption of

a. fat only.

b. all nutrients.

c. carbohydrate and fat only.

d. carbohydrate, fat, and protein only.

c 144(K) 83. What is the storage site of bile?

a. Liver

b. Pancreas

c. Gallbladder

d. Intestinal epithelial cells

a 144(K) 84. Spherical complexes of emulsified fats are known as

a. micelles.

b. chylomicrons.

c. monolipomicrons.

d. endogenous bilayer aggregates.

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b 144(A) 85. Which of the following substances cannot be absorbed directly into the blood?

a. Glycerol

b. Long-chain fatty acids

c. Short-chain fatty acids

d. Medium-chain fatty acids

b 144(K) 86. After a meal, most of the fat that eventually empties into the blood is in the form of

particles known as

a. micelles.

b. chylomicrons.

c. low-density lipoproteins.

d. very-low-density lipoproteins.

d 144(A) 87. Your aunt Gladys has a family history of heart disease. She decides to begin eating a

bowl of oatmeal every morning to help lower her blood cholesterol. After about a month

of following this routine, her cholesterol declined about 5 points. Which of the following

is the most likely explanation for this effect?

a. Oatmeal is a low-fat food and inhibits the body’s synthesis of cholesterol

b. Oatmeal is high in complex fibers that inhibit cholesterol-synthesizing enzymes

c. Oatmeal consumed on a regular basis suppresses the craving for high-cholesterol

foods

d. Oatmeal is high in soluble fibers that trap bile, causing the body to use more

cholesterol for bile replacement

b 144(K) 88. Which of the following is an example of enterohepatic circulation?

a. b. c. d. Chylomicron conversion to LDLs and HDLs

Recycling of bile from the intestine to the liver

Hormonal control of pancreatic digestive secretions

Liver secretion of eicosanoids that promote absorption of eicosanoid precursors

a 145-146(K) 89. What lipoprotein is largest in size?

a. Chylomicron

b. High-density lipoprotein

c. Low-density lipoprotein

d. Very-low-density lipoprotein

a 146(A) 90. In comparison to a low-density lipoprotein, a high-density lipoprotein contains

a. less lipid.

b. less protein.

c. more cholesterol.

d. more carbohydrate.

b 146(K) 91. Which of the following lipoproteins contains the highest percentage of cholesterol?

a. Chylomicron

b. Low-density lipoprotein

c. High-density lipoprotein

d. Very-low-density lipoprotein

b 147(A) 92. Among the following, which would be the least effective method to control blood

cholesterol levels?

a. Control body weight

b. Eat more insoluble fiber

c. Consume less saturated fat

d. Exercise intensely and frequently

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a 147(K) 93. What tissue contains special receptors for removing low-density lipoproteins from the

circulation?

a. Liver

b. Adipose

c. Arterial walls

d. Skeletal muscle

c 147(K) 94. A high risk of heart attack correlates with high blood levels of

a. free fatty acids.

b. high-density lipoproteins.

c. low-density lipoproteins.

d. very low-density lipoproteins.

c 147(K) 95. What lipoprotein is responsible for transporting cholesterol back to the liver from the

periphery?

a. Chylomicron

b. Low-density lipoprotein

c. High-density lipoprotein

d. Very-low density lipoprotein

c 147(K) 96. A low risk of cardiovascular disease correlates with high blood levels of

a. triglycerides.

b. free fatty acids.

c. high-density lipoproteins.

d. very-low-density lipoproteins.

Questions for Section 5.4 Lipids in the Body

c 148(K) 97. An important function of fat in the body is to

a. build muscle tissue.

b. regulate blood glucose levels.

c. protect vital organs against shock.

d. provide precursors for glucose synthesis.

d 148-149(K) 98. Which of the following lipids is an essential nutrient?

a. Lecithin

b. Cholesterol

c. Stearic acid

d. Linoleic acid

b 149(K) 99. Which of the following is used by the body to synthesize arachidonic acid?

a. Oleic acid

b. Linoleic acid

c. Palmitic acid

d. Linolenic acid

d 149(K) 100. Which of the following is an omega-3 fat?

a. Acetic acid

b. Palmitic acid

c. Linoleic acid

d. Docosahexaenoic acid

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b 149(K) c 149(K) b 149(A) d 149(A) d 149(K) c 150(K) d 150(K) d 150(K) 101. What are the building blocks in the body’s synthesis and elongation of fatty acids?

a. 1-carbon fragments

b. 2-carbon fragments

c. 4-carbon fragments

d. 7-carbon fragments

102. What is the immediate precursor for the eicosanoids?

a. Glucose

b. Hormones

c. Fatty acids

d. Cholesterol

103 Aspirin works to reduce the symptoms of infection or pain by retarding the synthesis of

a. arachidonic acid.

b. certain eicosanoids.

c. certain saturated fatty acids.

d. certain unsaturated fatty acids.

104. Which of the following foods provide(s) essential fatty acids?

a. Fish only

b. Beef only

c. Plants only

d. Fish, beef, and plants

105. What are the precursors for synthesis of the eicosanoids?

a. Steroids

b. Short-chain fatty acids

c. Medium-chain saturated fatty acids

d. Long-chain polyunsaturated fatty acids

106. Which of the following is a feature of adipose cell lipoprotein lipase?

a. b. c. The enzyme’s activity is reduced by high-fat diets

The enzyme’s activity is increased by signals from epinephrine and glucagon

The enzyme works to promote uptake of circulating triglycerides into storage

triglycerides

d. The enzyme is involved in release of free fatty acids from stored triglyceride into the

bloodstream

107. What is the function of lipoprotein lipase?

a. b. c. d. Synthesizes lipoproteins in liver cells

Synthesizes triglycerides in adipose cells

Assembles lipid particles into chylomicrons

Hydrolyzes blood triglycerides for uptake into cells

108. Which of the following is a feature of fat metabolism?

a. b. Cholesterol is stored primarily on the surface of veins

High-density lipoproteins represent the major transport vehicle for delivering fat to

the adipose cells

c. Fat storage is highly efficient due to the rapid uptake of the intact triglyceride

molecule by adipose cells

d. Triglycerides in the blood must first be broken down to monoglycerides, fatty acids,

and glycerol prior to uptake by the adipose cells

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a 150(A) 109. What nutrient is used to form ketones?

a. Fat

b. Protein

c. Simple carbohydrates

d. Complex carbohydrates

c 150(K) 110. What is the function of adipose cell hormone-sensitive lipase?

a. b. c. d. Hydrolyzes hormones involved in fat breakdown

Synthesizes new adipose cells from simple fatty acids

Hydrolyzes triglycerides to provide fatty acids for other cells

Synthesizes long-chain fatty acids to provide precursors for other cells

d 150(K) 111. Approximately what percentage of the body’s energy needs at rest is supplied by fat?

a. 5

b. 25

c. 40

d. 60

Questions for Section 5.5 Health Effects and Recommended Intakes of Lipids

c 151(K) 112. What is the highest total blood cholesterol concentration (mg/dL) that falls within the

desirable range?

a. 50

b. 101

c. 199

d. 299

b 151(A) 113. What is the highest blood triglyceride concentration (mg/dL) that falls within the

desirable range?

a. 99

b. 149

c. 199

d. 299

b 151(K) 114. Among the following dietary fatty acids, which has been found to raise blood cholesterol

level by the least amount?

a. Lauric

b. Stearic

c. Myristic

d. Palmitic

a 151(K) 115. The results of blood tests that reveal a person’s total cholesterol and triglycerides are

called a

a. lipid profile.

b. circulating fat count.

c. personal lipids count.

d. degenerative disease assessment.

d 151(K) 116. Each of the following is known to be linked to excessive intake of fats except

a. cancer.

b. obesity.

c. heart disease.

d. lactose intolerance.

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c 151-152(A) b 151-152(A) 117. Important factors in the selection of a margarine product include all of the following

except

a. b. c. d. it should be trans fat free.

it should be soft instead of hard.

it should contain primarily omega-3 fatty acids.

it should list liquid vegetable oil as the first ingredient.

118. Your roommate Bob has just come back from the doctor where he was subjected to a

blood lipid profile analysis. The doctor provided him with dietary changes because the

cholesterol results put him at increased risk for cardiovascular disease. Which of the

following results is consistent with the diagnosis?

a. Low LDL and high HDL

b. Low HDL and high LDL

c. Low DLD and high DHD

d. Low LDH and low HDL

b 151-152(A) c 152(K) 119. Which of the following sources of lipids should be substituted for saturated fats to help

lower blood cholesterol levels?

a. Butter

b. Canola oil

c. Coconut oil

d. Stick margarine

120. Which of the following is a characteristic of egg nutrition?

a. b. c. d. Eggs are high in both cholesterol and saturated fat

High omega-3 fat eggs are now available by prescription only

Although it is high in cholesterol, the egg is low in saturated fat

Even in people with a healthy lipid profile, consumption of one egg/day is

detrimental

b 152(A) a 152(K) 121. Your roommate Jeff wishes to switch from using corn oil to using one that is a good

source of omega-3 fats. Which of the following should be recommended?

a. Corn oil

b. Canola oil

c. Safflower oil

d. Liquefied lard

122. Which of the following is a feature of fat intake and health?

a. b. c. Intake of saturated fat raises blood cholesterol more than intake of cholesterol

High intakes of fish oil lower bleeding time and improve diabetes and wound healing

High intakes of short- and medium-chain fatty acids raise high-density lipoprotein

levels

d. Trans-fatty acids contained in polyunsaturated fats but not in monounsaturated fats

alter blood cholesterol levels

d 152(K) 123. Which of the following is a characteristic of the blood cholesterol level?

a. b. c. d. The desirable upper range is 250 mg per 100 mL

It can be reduced by increasing dietary intake of insoluble fiber

It can be lowered by increasing dietary intake of trans-fat

It can be lowered more effectively by reducing dietary intake of saturated fat than of

cholesterol

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c 152(K) b 152(A) c 152(K) d 152(K) b 152(K) a 152(K) b 152(K) a 152(K) 124. What is the approximate daily trans-fatty acid intake in the United States?

a. 500 mg

b. 2 g

c. 6 g

d. 12 g

125. Which of the following contains the least cholesterol per serving?

a. Steamed fish

b. Steamed corn

c. Broiled chicken

d. Very lean grilled steak

126. Major sources of cholesterol include all of the following except

a. Meat

b. Shrimp

c. Avocados

d. Hamburger

127. When consumed regularly, which of the following fatty acids helps prevent the formation

of blood clots?

a. Oleic acid

b. Stearic acid

c. Arachidonic acid

d. Eicosapentaenoic acid

128. Approximately how many milligrams of cholesterol are found in an egg?

a. 100

b. 200

c. 300

d. 450

129. Which of the following is a characteristic of eggs in nutrition?

a. b. Consumption of one egg per day by most people is not considered detrimental

The omega-3 fatty acid content of eggs is increased by feeding hens more coconut

oil

c. The amount of cholesterol in one egg is about the same as in one serving of ice

cream

d. The cholesterol is found in approximately equal amounts in the yolk and the white

(albumin)

130. Which of the following vegetable oils is a good source of omega-3 fatty acids?

a. Corn

b. Canola

c. Sesame

d. Coconut

131. All of the following statements are characteristics of lipid intake of U.S. adults except

a. b. c. d. trans-fatty acid averages about 1 g per day.

energy from fat provides about 34% of total energy intake.

cholesterol intake averages just under 300 mg per day for men.

saturated fat intake represents about one–third of total fat intake.

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b 152(K) b 152-153(A) a 152;154(K) a 152-153(K) c 153(A) b 153(A) c 153(A) b 153(K) 132. Which of the following is a feature of butter and margarine?

a. b. c. d. Butter is a major source of trans fatty acids

Butter contains more saturated fat and cholesterol than margarine does

Margarine contains approximately half as much cholesterol as butter does

Stick margarine contains half as much trans-fatty acids as soft margarine does

133. Ronnie eats a fairly balanced diet, but wants to include a good source of omega-3 fats.

Which of the following should be your recommendation?

a. Eggs

b. Salmon

c. Low-fat cheeses

d. Lean chicken breast

134. What percentage of the DV for saturated fats in the U.S. diet is provided by one egg?

a. 5

b. 20

c. 45

d. 75

135. Which of the following is a feature of the lipid content of foods?

a. b. c. d. Omega-3 fats are found in fish

Cholesterol is found in peanuts

Essential fatty acids are found in olestra

Low-density lipoproteins are found in coconut oil

136. A meal contains the following amounts of long-chain fatty acids: 3 g EPA, 1 g DHA, 5 g

stearic acid, 4 g linolenic acid, 10 g linoleic acid, and 3 g arachidonic acid. What is the

approximate ratio of omega-6 to omega-3 fatty acids?

a. 0.4 : 1.0

b. 1.0 : 1.0

c. 1.6 : 1.0

d. 2.4 : 1.0

137. A lacto-ovo vegetarian wishing to ensure a liberal intake of linolenic acid should

consume

a. eggs and milk.

b. canola oil and walnuts.

c. safflower oil margarine.

d. corn oil and sunflower oil.

138. A person who regularly consumes fish such as shark, king mackerel, and swordfish is at

risk for ingesting potentially toxic amounts of

a. EPA.

b. DHA.

c. mercury.

d. cadmium.

139. Which of the following is a characteristic of fish consumption?

a. b. c. d. Fish is a good source of iron

Fatty fish contain the highest amounts of omega-3 fatty acids

The minimum intake to gain any benefit is 3 servings per week

Even fried fish from fast-food restaurants provide a favorable balance of omega-6

and omega-3 fats

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d 153(K) a 153(A) d 153(A) b 153(A) d 153(K) a 153(A) a 154(K) d 154(A) 140. High intakes of omega-3 polyunsaturated fatty acids are known to increase the risk for all

of the following except

a. poor wound healing.

b. higher LDL cholesterol.

c. suppressed immune function.

d. inflammation of the pancreas.

141. Which of the following is a good source of eicosapentaenoic acid?

a. Tuna

b. Butter

c. Salad oil

d. Shortening

142. To achieve a dietary balance of omega-3 and omega-6 fatty acids, what is the

recommended intake (g) of omega-3 fats for a person who consumes 30 g of omega-6

fats?

a. 5

b. 10

c. 20

d. There is no specific recommendation based on omega-6 intake

143. The oils found in walnuts, soybeans, flaxseed, and wheat germ represent a good source of

preformed

a. eicosanoids.

b. linolenic acid.

c. docosahexaenoic acid.

d. eicosapentaenoic acid.

144. All of the following foods contain liberal amounts of eicosapentaenoic and

docosahexaenoic acid except

a. tuna.

b. salmon.

c. human milk.

d. soybean oil.

145. Which of the following is a likely explanation for the imbalance between omega-6 and

omega-3 lipids in the U.S. diet?

a. b. c. d. High intakes of meat and low intakes of fish

Low intakes of vegetable oils and high intakes of fish

High intakes of beef fat and low intakes of vegetable oils

Low intakes of beef fat and high intakes of vegetable oils

146. Which of the following describes a recognized relationship between dietary fat and

cancer?

a. Fat from milk does not increase risk for cancer

b. Dietary fat initiates rather than promotes cancer formation

c. High intakes of omega-3 fatty acids promote cancer development in animals

d. The evidence linking fat intake with cancer is stronger than that linking it with heart

disease

147. According to the DRI, what is the upper limit of fat (g) that may be consumed by a

healthy person requiring 3000 kcalories per day?

a. 33

b. 66

c. 83

d. 117

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c 154(K) d 154(A) c 154(K) b 154(K) c 154(K) c 154(A) 148. According to the Dietary Guidelines, what should be the maximum total fat intake as a

percentage of energy intake?

a. 10

b. 20

c. 35

d. 50

149. Jenny is trying to lose weight by decreasing the fat in her diet. At the grocery store she is

overwhelmed by all the claims on the food product labels, and finally chooses an

expensive fat-free frozen dessert. Which of the following would be an appropriate

analysis of Jenny’s decision?

a. Most frozen desserts are fat-free and she should not pay extra for one with a fat-free

claim

b. Since fats contribute 9 kcalories per gram, she can eat twice as many kcalories from

this dessert and still lose weight

c. As long as she makes sure to eat the dessert before 9 p.m. it should not contribute

much to her daily kcaloric intake

d. Fat-free products typically have so much added sugar that the kcalorie count can be

as high as in the regular-fat product

150. For most adults, what is the recommended minimum amount of fat that should be

consumed, as a percentage of total energy intake?

a. 5

b. 15

c. 20

d. 35

151. As a percentage of daily energy intake, what is the recommended range for the essential

fatty acids?

a. 2.5-5.5

b. 5.6-11.2

c. 12-19

d. 20-35

152. According to the Dietary Guidelines, what should be the maximum daily intake of

cholesterol on a 2500-kcalorie diet?

a. 50 mg

b. 150 mg

c. 300 mg

d. 1,000 mg

153. Approximately how many grams of fat would be contained in an 800-kcalorie meal that

provides 50% of the energy from carbohydrate, 20% from protein, and the remainder

from fat?

a. 15

b. 22

c. 27

d. 35

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b 154(A) 154. A meal providing 1200 kcalories contains 10 g of saturated fats, 14 g of monounsaturated

fats, and 20 g of polyunsaturated fats. What is the percentage of energy supplied by the

lipids?

a. 22

b. 33

c. 44

d. 55

c 154(K) 155. Surveys show that U.S. adults’ average intake of fat as a percentage of total energy intake

is

a. 20.

b. 27.

c. 34.

d. 55.

b 155(K) 156. The average daily cholesterol intake (mg) of U.S. women is about

a. 110.

b. 235.

c. 360.

d. 925.

a 155(A) 157. Which of the following is a feature of fat in the diet of athletes?

a. b. c. d. A minimum of 20% fat energy in the diet is needed

Energy derived from fat has very little bearing on performance

Optimal performance is found with a high-carbohydrate, 15% total fat kcalories, diet

Diets with at least 10% total kcalories from fat are still able to provide the

recommended amounts of micronutrients

d 157(A) c 157(K) d 157(K) 158. Which of the following does not describe a function of fat?

a. Adds flavor to food

b. c. d. Serves as a carrier of fat-soluble vitamins

Is an essential constituent of body tissues

Supplies up to 25% of the body’s energy needs during rest

159. Which of the following is the most desirable quality that fat adds to foods?

a. Color

b. Sweetness

c. Palatability

d. Hydrogenation

160. All of the following are features of dairy products consumption except

a. b. c. d. fat-free milk contains no cholesterol.

yogurt is known to lower blood cholesterol.

fermented milk products raise the bacterial population in the colon.

fat-free milk is lower in kcalories but also lower in protein and calcium than whole

milk.

b 157(K) 161. Which of the following is a characteristic of the lipid content of livestock?

a. b. c. The meat from “free-range” animals is similar in composition to soy protein

“Free-range” animals contain more omega-3 fats in the meat than grain-fed animals

Grain-fed animals contain more polyunsaturated fatty acids in the meat compared

with grass-fed animals

d. Grain-fed animals contain lower concentrations of fat in the meat compared with

grass-fed animals

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a 157(A) 162. Which of the following is appropriate dietary advice for reducing fat intake?

a. b. Limit intake of all fried foods because they contain abundant fat

Substitute crackers and cornbread for other starches because they are likely lower in

fat

c. Consume foods with more invisible fat because this type of fat is not absorbed well

from the digestive tract

d. Increase consumption of soups, such as cream-of-mushroom soup prepared with

water, because the fat content is usually very low

b 157(A) 163. A food that represents a visible fat would be

a. nuts.

b. butter.

c. avocados.

d. chocolate.

c 158(A) 164. You and your friend John are planning a college graduation party and you want to

include healthy snack alternatives. You select fruit, veggies, low-fat dips, low-fat

cheeses, whole-wheat crackers, and low-fat potato chips. John says he has heard about

the fat replacer olestra in the potato chips and asks you how it works. You reply that

olestra

a. slows the pancreas’s release of lipase enzyme.

b. consists of tight protein-binding molecules that replace the fat molecules usually

present in potato chips.

c. contains a fat-like substance that the body’s enzymes can’t break down and therefore

cannot be absorbed.

d. is first subjected to radiation exposure to desaturate the bonds within the fat

molecules, which reduces the kcalorie content.

b 158(A) 165. Which of the following is not a feature of the artificial fat replacer olestra?

a. b. c. d. It can be used in the frying of foods

It leads to constipation in some individuals

Its chemical structure is similar to a triglyceride

It lowers absorption of vitamins A and K from foods

c 158(K) 166. Sucrose polyester is another name for

a. BHA.

b. DHA.

c. olestra.

d. trans fat.

d 158(K) 167. Which of the following is a drawback of olestra consumption?

a. b. c. d. It yields 9 kcalories per gram

It imparts off-flavors to foods

It raises blood glucose levels

It inhibits absorption of vitamin E

c 159(K) 168. Which of the following is a feature of olestra in foods?

a. b. c. d. It has a class II toxicity rating by the FDA

It binds to water-soluble vitamins in the digestive tract

It causes no net loss of fat-soluble vitamins from the digestive tract

It causes abdominal cramping and loose stools in approximately one-third of

consumers

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d 159-160(A) 169. Information on a food label about the fat content per serving includes all of the following

except

a. the total fat content, in g.

b. the trans fat content, in g.

c. the saturated fat content, in g.

d. the percentage of total kcalories contributed by fat.

Questions for Section 5.6 High-Fat Foods—Friend or Foe?

b 164-165(K) a 165(K) d 165(K) d 165(K) a 166(K) 170. Results of the Seven Countries Study found that the population groups with highest and

lowest rates of heart disease both consumed at least 40% of their kcalories from fat but

the healthier group was found to ingest more

a. dairy.

b. olive oil.

c. fatty fish.

d. grass-fed livestock.

171. In most nuts, what is the distribution of saturated and unsaturated fats, in order of highest

to lowest amounts?

a. Monounsaturated, polyunsaturated, saturated

b. Polyunsaturated, monounsaturated, saturated

c. Polyunsaturated, saturated, monounsaturated

d. Saturated, monounsaturated, polyunsaturated

172. Which of the following is a feature of nut consumption and improved cardiovascular

health?

a. b. c. d. The benefit is unrelated to the phytochemical content

The benefit is unrelated to changes in LDL concentration

The benefit is found only from ingestion of a few types of nuts

The benefit may be related, in part, to the high content of monounsaturated fats and

low content of saturated fats

173. Of the total fat content of the most commonly eaten nuts in the United States, what is the

approximate percentage of monounsaturated fat?

a. 5

b. 30

c. 45

d. 60

174. Studies show that regular consumption of fatty fish leads to

a. lower blood pressure.

b. higher blood cholesterol.

c. greater tendency of the blood to clot.

d. decreased storage of omega-3 fatty acids.

a 166-167(K) 175. Which of the following fish is generally highest in mercury?

a. Shark

b. Catfish

c. Salmon

d. Canned light tuna

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a 166-167(A) a 167(K) c 167(K) b 168(K) a 168(K) b 168(A) 176. Why does the FDA advise against consumption of certain fish such as swordfish and

shark by women of childbearing age?

a. b. c. d. These fish are a major source of toxic mercury

The omega-3 fatty acids may induce premature labor

The omega-3 fatty acids prolong bleeding time during delivery

These fish contain unusually high amounts of medium-chain triglycerides

177. A characteristic of farm-raised fish is they are

a. lower in omega-3 fats.

b. higher in soluble fiber.

c. higher in trace elements.

d. usually higher in mercury.

178. Studies show that a 1% increase in dietary saturated fatty acids will raise the risk of heart

disease by what percentage?

a. 0.5

b. 1.0

c. 2.0

d. 5.0

179. Which of the following is not a common dietary source of trans fats?

a. Fried foods

b. Whole milk

c. Nondairy creamers

d. Microwave popcorn

180. Which of the following is a good plant source of omega-3 lipids?

a. Flax seeds

b. Safflower oil

c. Sunflower seeds

d. Corn oil margarine

181. A major feature of the Mediterranean diet is liberal intake of

a. eggs.

b. olive oil.

c. lean meat.

d. fortified butter.

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Matching

K 134 01. The simplest dietary fatty acid

O 134 02. A source of medium-chain saturated fatty acids

L 134 03. A long-chain saturated fatty acid

J 135 04. A good source of monounsaturated fats

E 140 05. A phospholipid

M 141 06. Major dietary precursor for vitamin D synthesis

A 143 07. Source of bile

R 143 08. Signals the release of bile

I 143 09. Major source of lipase

C 144 10. Structure assisting absorption of long-chain fats

P 144 11. A lipoprotein synthesized within intestinal absorptive cells

T 146 12. A lipoprotein made primarily by the liver

S 147 13. The lipoprotein type with the highest percentage of protein

D 149 14. Slows the synthesis of eicosanoids

Q 149 15. An essential fatty acid

N 152 16. Common source of trans-fatty acids

H 152 17. Good food source of omega-3 fatty acids

F 153 18. Good food source of omega-6 fatty acids

B 158 19. Fat replacement product made from fat

G 168 20. Oil that is characteristic of the Mediterranean diet

A. Liver

B. Olestra

C. Micelle

D. Aspirin

E. Lecithin

F. Corn oil

G. Olive oil

H. Sardines

I. Pancreas

J. Canola oil

K. Acetic acid

L. Stearic acid

M Cholesterol

N. Potato chips

O. Tropical oils

P. Chylomicron

Q. Linolenic acid

R. Cholecystokinin

S. High-density lipoprotein

T. Very-low density

lipoprotein

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Essay

Page(s)

133-137 137-139 138-139 139;151-152 141;145-147 141;147;151-152 142-145 143-144 143-145 143-145 144-145 145-148 148-149 149 149 149;152-154 01. Describe how fatty acids may differ in terms of chain length, saturation and

unsaturation, position of the first double bond, and effects of partial hydrogenation,

and explain how these differences influence the characteristics of the fatty acids.

02. What methods are used by the food industry to inhibit rancidity of the unsaturated

lipids in foods?

03. Describe the process of fat hydrogenation and discuss its advantages and

disadvantages.

04. Discuss the meaning and significance of trans-fatty acids in the diet. List four

common food sources.

05. Discuss the role of dietary cholesterol and the endogenous production of cholesterol

and heart disease. What is meant by “good” and “bad” cholesterol?

06. While shopping at the supermarket, you overhear a man say that, because he was

diagnosed with a mild case of atherosclerosis, he intends to become a vegan so as to

eliminate all cholesterol from his diet and his body. Discuss the validity of his

rationale.

07. Discuss in detail the digestion, absorption, and transport of dietary lipids, including

the sterols.

08. Discuss the roles for the lipases that originate in the mouth, stomach, pancreas, and

small intestine.

09. Compare and contrast the digestion-absorption mechanisms for long-chain vs. short-

chain fatty acids.

10. The fat content of a new snack food is composed of mixed triglycerides in which the

three fatty acids attached to the glycerol are a short-chain, a medium-chain, and a

long-chain fatty acid. Explain the digestion, absorption, and transport of this lipid.

11. What is the role of micelles in the absorption of lipids?

12. Discuss the composition and function of the major circulating lipoproteins.

13. Discuss the functions of lipids in the body. What is the role of the liver in

metabolizing and processing fats?

14 How do eicosanoids differ from hormones?

15. List the essential fatty acids (EFA) for human beings. What are the signs of EFA

deficiency? What is the minimum amount of EFA required to prevent a deficiency?

What foods are rich sources of EFA?

16. Explain the chemical differences between fish oil and corn oil. Discuss the health

benefits of fish oil. What are some of the possible disadvantages of increasing the

consumption of fish and fish oil supplements?

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150 151-152;160 151-153;161 151-154;167-168 152-153 152-153 156-158 156-158 156-157 157 158-159 165-166 164-165 165-166 166-167 167-168 168-169 17. Discuss the roles of hormone-sensitive lipase and lipoprotein lipase in the

metabolism of fats.

18. Compare and contrast the risks from consuming margarine or butter.

19. Discuss the relationship of dietary fats to atherosclerosis. What dietary changes bring

about the greatest reductions in blood lipids?

20. Your uncle discloses that he was found to have a high blood level of LDL and a low

concentration of HDL. What changes in lifestyle would help in reversing the LDL

and HDL ratio?

21. Your friend does not like the taste of any kind of fish, but wishes to consume more

omega-3 fats. What advice is appropriate?

22. Your aunt Lillie has a heart condition and insists that taking liberal amounts of fish

oil capsules every day will help her ailment. What are the possible adverse effects

from this practice?

23. List strategies for lowering fat intake with minimal impact on diet palatability.

24. Provide examples of how food manufacturers are able to reduce the content and

concentration of lipids in their food products.

25. What factors make it difficult for people to adhere to low-fat diets?

26. What is meant by invisible fat? List three common sources in the diet.

27. Discuss the benefits and possible hazards of dietary fat replacers in the diet.

28. How are nuts thought to protect against heart disease?

29. Discuss the potential health benefits of substituting olive oil for other cooking fats.

30. Discuss the health benefits of substituting nuts for other sources of fat in the diet.

31. How are omega-3 fats thought to protect against heart disease?

32. Discuss the most common food sources of harmful fats and ways to reduce their

intake.

33. Describe the content of traditional Mediterranean diets and explain the benefits of

these foods to cardiovascular health.

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