Chapter 63 Propulsion and Mixing of Food in the Alimentary

Chapter 63  Propulsion and Mixing of Food in the Alimentary

Complete Chapter Questions And Answers
 

Sample Questions

1. Which of the following would eliminate receptive relaxation of the lower esophageal sphincter and fundus portion of the stomach?
A. Increased serum gastrin
B. Increased serum secretin
C. Sympathectomy
D. Sympathetic stimulation
E. Vagal stimulation
F. Vagotomy

ANS: F

2. Which of the following elements of the defecation process require input from higher centers of the brain in a healthy person under normal conditions?
A. Peristaltic contractions of the sigmoid colon
B. Rectal distention
C. Rectal peristalsis
D. Relaxation of external anal sphincter
E. Relaxation of internal anal sphincter

ANS: D

3. Mass movements are often stimulated after a meal by distention of the stomach and distention of the duodenum. Mass movements often lead to which of the following?
A. Bowel movements
B. Gastric movements
C. Haustrations
D. Esophageal contractions
E. Pharyngeal peristalsis

ANS: A

4. Achalasia is associated with which of the following at rest and during swallowing?
A. Higher than normal pressure at the lower esophageal sphincter
B. Lower than normal pressure at the lower esophageal sphincter
C. Higher than normal pressure at the upper esophageal sphincter
D. Lower than normal pressure at the upper esophageal sphincter

ANS: A

5. Distention of the rectum causes a reflex relaxation of which structure?
A. Abdominal muscle
B. Diaphragm
C. External anal sphincter
D. Internal anal sphincter
E. Sigmoid colon

ANS: D