Cholecystokinin

woman with abdominal pain

Medical Definition of Cholecystokinin

Cholecystokinin: Abbreviated CCK. A polypeptide hormone that stimulates the contraction of the gallbladder with release of bile and the secretion of pancreatic enzymes into the small intestine. CCK is secreted by cells lining the upper intestine and by the hypothalamus. Hypothalamic cholecystokinin is a neurotransmitter. Called also pancreozymin.


Quick GuideDigestive Disorders: Common Misconceptions

Digestive Disorders: Common Misconceptions

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Reviewed on 9/14/2016

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