Question

The function of the hormone cholecystokin (CCK) in the small intestine is to:

a. secrete gastric lipase, which in turn activates lingual lipase.
b. contract the gallbladder and release bile into the duodenum.
c. cause the stomach lining to vigorously contract.
d. synthesize pancreatic lipase that gets released into the stomach.

Answer 1

Cholecystokinin (CCK) stimulates the gallbladder to contract and release bile salts into the duodenum and also stimulates the pancreas to release pancreatic lipase, aiding in lipid digestion.

Step-by-step explanation:

The function of the hormone cholecystokinin (CCK) in the small intestine is to contract the gallbladder and release bile into the duodenum. CCK is secreted by intestinal cells when food in the form of chyme reaches the small intestine. This hormone not only stimulates the gallbladder to contract and expel stored bile salts into the duodenum for the digestion of fats, but it also encourages the pancreas to release pancreatic lipase. Pancreatic lipase plays a critical role in breaking down ingested triglycerides into smaller chain fatty acids and monoglycerides, facilitating lipid metabolism. Additionally, CCK acts as a hunger suppressant when it travels to the brain.