Secretion of secretin is forced by:
Correct answer: A. Food from stomach
- A. Food from stomach
- B. Bile form liver
- C. Pancreatic juice
- D. All of these
Explanation
The secretion of secretin is only forced by the presence of acidic chyme in the duodenum. Chyme is the partially digested food that enters the small intestine from the stomach. When chyme enters the duodenum, it triggers the release of secretin from S cells in the duodenal mucosa. Secretin is a hormone that stimulates the secretion of bicarbonate from the pancreas.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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