Cholecystokinin (CCK)
Details the gastrointestinal hormone that stimulates the secretion of pancreatic enzymes and the contraction of the gallbladder to release bile.
What is Cholecystokinin (CCK)?
A gastrointestinal hormone produced by the small intestine that stimulates the release of pancreatic enzymes and bile, and promotes satiety.
Key points
- Identify the source and stimulus for CCK release.
- Describe the primary functions of CCK in digestion.
- Explain the role of CCK in fat digestion.
- Differentiate CCK's actions from other gastrointestinal hormones.
Common exam trap
Confusing CCK's role with secretin (which primarily stimulates bicarbonate secretion from the pancreas).
Definitions
- Term
Cholecystokinin (CCK)
- Meaning
A gastrointestinal hormone produced by the small intestine that stimulates the release of pancreatic enzymes and bile, and promotes satiety.
- Term
Bile
- Meaning
A digestive fluid produced by the liver and stored in the gallbladder, which aids in the digestion and absorption of fats.
- Term
Pancreatic enzymes
- Meaning
Digestive enzymes (like amylase, lipase, proteases) secreted by the pancreas to break down carbohydrates, fats, and proteins.
Learning objectives
Identify the source and stimulus for CCK release.
Describe the primary functions of CCK in digestion.
Explain the role of CCK in fat digestion.
Differentiate CCK's actions from other gastrointestinal hormones.
Prerequisites
Digestive system anatomy (stomach, small intestine, pancreas, gallbladder, liver).
Basic understanding of enzyme function.
Hormonal regulation concepts.
Common mistakes
Confusing CCK's role with secretin (which primarily stimulates bicarbonate secretion from the pancreas).
Forgetting that both fats and proteins stimulate CCK release.
Not understanding the dual action on pancreas and gallbladder.
Keywords
Cholecystokinin
CCK
Gastrointestinal hormone
Pancreas
Gallbladder
Bile
Digestive enzymes
Fat digestion
Duodenum
Satiety
Practice preview
Which of the following hormones primarily stimulates the secretion of pancreatic enzymes and the contraction of the gallbladder?…
easy
The release of Cholecystokinin (CCK) is primarily triggered by the presence of which substances in the duodenum?…
easy
Consider the following statements regarding gastrointestinal hormones: (A) Secretin primarily stimulates the secretion of pancreatic enzymes. (B) Gastrin stimulates the secretion of HCl and pepsinogen in the stomach. (C)…
medium