Which of the following correctly describes the hormone cholecystokinin (CCK)?
A) It is secreted by the stomach to trigger gallbladder contraction and pancreatic secretion.
B) It is secreted by the duodenum to cause the bile and pancreatic ducts to release bicarbonate.
C) It is secreted by acinar cells in the pancreas and helps break down lipids, proteins, and carbohydrates.
D) It is secreted by the duodenum to cause gallbladder contraction and the release of pancreatic enzymes.

Question

Quizplus · Accepted Answer

Cholecystokinin (CCK) is a hormone that is secreted by the duodenum in response to the presence of fats and proteins. Its primary function is to cause the gallbladder to contract and release bile, and to stimulate the release of pancreatic enzymes that aid in the digestion of fats, proteins, and carbohydrates. Option D accurately describes the function of CCK. Option A is incorrect because CCK is not secreted by the stomach. Option B is incorrect because while CCK does stimulate the release of bicarbonate from the pancreas, it does not have a direct effect on the bile duct. Option C is incorrect because while pancreatic acinar cells do secrete enzymes to help break down food, CCK is not one of these enzymes.

Which of the Following Correctly Describes the Hormone Cholecystokinin (CCK)