Question

Describe the role of cholecystokinin (CCK) on digestion and secretion

a) Stimulates gastric acid secretion
b) Inhibits bile release
c) Stimulates pancreatic enzyme release and gallbladder contraction
d) Inhibits intestinal motility

Answer 1

Cholecystokinin (CCK) is a hormone that stimulates gastric acid secretion, inhibits bile release, stimulates pancreatic enzyme release and gallbladder contraction, and inhibits intestinal motility.

Step-by-step explanation:

Cholecystokinin (CCK) is a hormone that plays a crucial role in digestion and secretion. It has several functions:

1. Stimulates gastric acid secretion: CCK stimulates the production and secretion of gastric acid by the parietal cells of the stomach mucosa.
2. Inhibits bile release: CCK inhibits the release of bile from the gallbladder, which is needed for the breakdown and absorption of fats.
3. Stimulates pancreatic enzyme release and gallbladder contraction: CCK stimulates the pancreas to release pancreatic enzymes, such as lipase, amylase, and proteases, which are necessary for the digestion of fats, carbohydrates, and proteins. It also stimulates the contraction of the gallbladder, leading to the release of bile salts into the duodenum.
4. Inhibits intestinal motility: CCK slows down the movement of food through the intestines, facilitating the proper absorption of nutrients.