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Chapter 29 Physiology of the Digestive System
Complete chapter Questions And Answers
Sample Questions
TRUE/F ALSE
1. The bolus of food is formed during the pharyngeal stage of deglutition.
ANS: F DIF: Memorization REF: Page 904 TOP: Mechanical Digestion
2. Respiration is inhibited for the 1 to 3 seconds required for food to clear the pharynx during each swallowing.
ANS: T DIF: Memorization REF: Page 904 TOP: Mechanical Digestion
3. To propel food from the pharynx into the esophagus, three openings must be blocked.
ANS: T DIF: Memorization REF: Page 904 TOP: Mechanical Digestion
4. Peristalsis is a back-and-forth action that breaks apart chunks of food and mixes in digestive juices.
ANS: F DIF: Memorization REF: Page 906 TOP: Mechanical Digestion
5. The process of emptying the stomach takes about 12 hours after a meal.
ANS: F DIF: Memorization REF: Page 906 TOP: Regulation of Motility
6. After leaving the stomach, chyme normally takes about 5 hours to pass all the way through the small intestine.
ANS: T DIF: Memorization REF: Page 908 TOP: Regulation of Motility
7. Enzymes are unique in that they can function optimally within a wide range of pH.
ANS: F DIF: Memorization REF: Page 909 TOP: Chemical Digestion
Mosby items and derived items © 2013, 2010, 2007, 2003 by Mosby, Inc., an affiliate of Elsevier Inc.
Test Bank 29A-2
8. Enzymes are usually defined as inorganic catalysts.
ANS: F DIF: Memorization REF: Page 908
TOP: Chemical Digestion
MULTIPLE CHOICE
1. Which of the following is not one of the openings that must be blocked when food moves from the pharynx into the esophagus?
a. Oropharynx
b. Nasopharynx
c. Larynx d. Mouth
ANS: A DIF: Memorization TOP: Mechanical Digestion
2. The process of swallowing is known as: a. mastication.
b. deglutition.
c. peristalsis.
d. segmentation.
ANS: B DIF: Memorization TOP: Mechanical Digestion
REF: Page 904
REF: Page 904
3. Which of the following is a true statement?
a. The oral stage of swallowing is involuntary and under the control of the cerebral
cortex.
ANS: C DIF: Memorization TOP: Mechanical Digestion
REF: Page 904
4. Which of the processes of mechanical digestion involves the esophagus?
d. Both A and B
ANS: D
906
TOP: Mechanical Digestion
REF: Page 904|Page
DIF: Memorization
Mosby items and derived items © 2013, 2010, 2007, 2003 by Mosby, Inc., an affiliate of Elsevier Inc.
Test Bank
29B-2
5. The enterogastric reflex causes:
ANS: C DIF: Memorization TOP: Mechanical Digestion
REF: Page 907
6. Which of the following is not true of enzymes?
ANS: B DIF: Memorization TOP: Chemical Digestion
ANS: A DIF: Memorization TOP: Mechanical Digestion
ANS: B DIF: Memorization TOP: Mechanical Digestion
REF: Page 908
REF: Page 904
REF: Page 906
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