Cholecystokinin is produced from:
The major factor controlling the contraction of the gallbladder is the hormone cholecystokinin (CCK), which is released from the duodenal mucosa (I cells) in response to the ingestion of fats and amino acids. REF: GUYTON 12TH ED.
Hepatocyte
Gastric mucosa
Duodenal mucosa
Epithelial cells of distal common bile duct
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