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The contraction of gall bladder is stimulated by:

1. Gastrin
2. Cholecystokinin
3. Secretin
4. Enterogastrone

Correct answer: Cholecystokinin

Solution

Cholecystokinin (CCK) is released from the duodenum in response to fats and amino acids. It causes gallbladder contraction, releasing bile into the intestine.

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