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“cholecystokinin”
A hormone that is secreted by cells in the duodenum (first section of the small intestine) and which stimulates the release of bile into the intestine and the secretion of enzymes by the pancreas: "Cholecystokinins are a group of peptide hormones which stimulate the digestion of fat and protein in the intestines."
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cholecysto-, cyholecyst-
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