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Which of these hormones stimulates secretion of water and bicarbonate ions?

(a) MSH

(b) CCK

(c) Gastrin

(d) Secretin

I got this question in an interview for internship.

This intriguing question comes from Chemical Control and Coordination topic in chapter Chemical Control and Coordination of Biology – Class 11

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Right answer is (d) Secretin

For explanation I would say: Secretin is a peptide hormone secreted by the endocrine cells of the gastrointestinal tract. It stimulates the exocrine cells of the pancreas. As a result, water and bicarbonate ions are secreted.

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