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The correct answer is c. Cholecystokinin is secreted by the duodendum wall and binds to receptors in the gallbladder and pancreas. It causes the secretion of bile from the gallbladder and x-ases from the pancreas. Secretin, on the other hand, is secreted by the duodendum wall and binds to a receptor in the pancreas. It causes the secretion of sodium bicarbonate.
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