............ is a potent vasodilator.

Options

AHistamine
BSerotonin
CCodeine
DCimetidine

Correct answer

A. Histamine

Step-by-step solution

Histamine is a potent vasodilator. It contracts smooth muscles and relaxes other muscles of blood vessels of stomach walls. In stomach, histamine stimulates the secretion of hydrochloric acid and pepsin.

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