The inhibitory effect of vagus nerve on the heart is due to the secretion of

Acetylcholine

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Norepinephrine

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Glycine

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Dopamine

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Solution

The correct option is A Acetylcholine
Acetylcholine is the main vagal neurotransmitter. The vagus nerve controls the heart rate by electrical impulses to the SA node of the heart in which acetylcholine release slows down the pulse rate and decreases the blood pressure. Thus the correct answer is option A.

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