The site of production of cholecystokinin is:
a. The stomach
b. The small intestine
c. The pancreas
d. The large intestine

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Understand that cholecystokinin (CCK) is a hormone involved in digestion, particularly in stimulating the release of digestive enzymes and bile.

Recall that hormones like CCK are produced by specific cells located in certain parts of the digestive system.

Identify the main regions of the digestive tract: stomach, small intestine, pancreas, and large intestine.

Know that CCK is secreted by the I-cells, which are specialized cells found in the mucosal lining of the small intestine, especially in the duodenum and jejunum.

Conclude that the correct site of production of cholecystokinin is the small intestine.

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Cholecystokinin is a digestive hormone that stimulates the digestion of fats and proteins. It triggers the release of digestive enzymes from the pancreas and bile from the gallbladder, aiding in nutrient breakdown and absorption.

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