Question

The crypts of Lieberkuhn secrete __________.

• A. gastrin
• B. rennin
• C. cholecystokinin
• D. succus entericus

Answer 1

The correct option is D succus entericus

The crypts of Lieberkuhn are the tubular glands that are present in between the finger-like projections of the small intestine called villi. The cells of these glands are called paneth cells which secrete intestinal juice, also called succus entericus. It refers to the clear to pale yellow watery secretions from the glands lining the small intestine walls. As they gradually migrate along the side of the crypt and the villus; they are eventually shed into the lumen of the intestine.

Gastrin is a peptide hormone that stimulates secretion of gastric acid (HCl) by the parietal cells of the stomach and aids in gastric motility.

Chymosin, known also as rennin, is a proteolytic enzyme related to pepsin that synthesized by chief cells in the stomach of some animals. Its role in digestion is to curdle or coagulate milk in the stomach, a process of considerable importance in the very young animal.

Cholecystokinin is a peptide hormone of the gastrointestinal system responsible for stimulating the digestion of fat and protein.