The 'Hormone Cholecystokinin' (CCK) is secreted by the I cells of the duodenal mucosa in response to the presence of fats and proteins. Its primary actions include:
A. Stimulating gastric acid secretion
B. Inhibiting the release of bile
C. Increasing blood glucose levels
D. Inhibiting gastric emptying and stimulating the gall bladder to contract and the pancreas to secrete digestive enzymes
Answer: Option D
Solution (By JKSSB Mock Tests)
Cholecystokinin (CCK) is a peptide hormone released by the I cells of the duodenum when acidic chyme containing fats (lipids) and partially digested proteins enters from the stomach. CCK has two major digestive actions: 1) It stimulates the gall bladder to contract, releasing stored bile into the duodenum to emulsify fats. 2) It stimulates the pancreatic acinar cells to secrete a juice rich in digestive enzymes (lipases, proteases, amylase). It also slows down gastric emptying, allowing more time for digestion in the small intestine.
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