The presence of small polypeptides and amino acids in the small intestine causes specialized cells there to release the hormone _____.
A)gastrin
B)pepsin
C)cholecystokinin
D)trypsin

Question

Quizplus · Accepted Answer

The presence of amino acids in the small intestine triggers the release of cholecystokinin (CCK) from specialized cells called I cells. CCK stimulates the release of digestive enzymes from the pancreas and the contraction of the gallbladder to release bile, which aids in the absorption of fats. Gastrin is released in response to the presence of food in the stomach, and pepsin and trypsin are enzymes involved in the breakdown of proteins that are released by the stomach and pancreas, respectively.

The Presence of Small Polypeptides and Amino Acids in the Small