Physiology – MCQ 13 – All of the following statements are true for 'Intestinal Motility' except?
All of the following statements are true for ‘Intestinal Motility’ except:
A. Does not depend on Gastric motility
B. Increased by Distension
C. Increased by Acetylcholine
D. Increased by cholecystokinin
Correct answer : Does not depend on Gastric motility
The stomach can influence intestinal motility by means of migratory motor complexes and gastroileal reflex.
Migratory motor complex
- It is seen in empty stomach
- Every 90 minutes a wave of depolarization starts in the stomach and proceeds towards the intestine
- It reaches upto the terminal ileum
- This is followed by a peristaltic wave
- The wave of depolarization and the peristaltic wave are together known as migratory motor complex
Gastroileal reflex
- Vigorous gastric secretion / peristalsis can induce ileal peristalsis
- The contents of the ileum are pushed into the colon
- This may result in a mass peristalsis of the colon with an urge to defecate
2 Comments
Ans.A
b.