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Questions and Answers
Which of the following actions is NOT performed by CCK?
Triglycerides stimulate the release of CCK.
False
What types of stimuli trigger the release of CCK?
Small peptides, amino acids, fatty acids, and monoglycerides.
CCK inhibits gastric emptying to allow more time for intestinal digestion and ___.
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Match the following actions of CCK with their descriptions:
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Study Notes
Actions of CCK
- Contracts the gallbladder while relaxing the sphincter of Oddi, facilitating bile secretion into the intestinal tract.
- Stimulates the secretion of pancreatic enzymes, aiding in digestion.
- Enhances the effect of secretin, which stimulates bicarbonate secretion in the pancreas.
- Promotes growth of the exocrine pancreas, important for digestive function.
- Inhibits gastric emptying; fat-containing meals lead to increased CCK secretion, allowing more time for intestinal digestion and absorption.
Stimuli for the Release of CCK
- Secreted by I cells located in the duodenal and jejunal mucosa.
- Release triggered by:
- Presence of small peptides and amino acids in the intestines.
- Fatty acids and monoglycerides, essential for stimulating digestion.
- Triglycerides do not stimulate CCK because they cannot penetrate intestinal cell membranes.
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Description
Explore the various actions of cholecystokinin (CCK) in the digestive system. This quiz covers its role in gallbladder contraction, pancreatic enzyme secretion, and its effects on gastric emptying. Test your understanding of how fat in meals influences CCK secretion and digestive processes.
