Vagus nerve slows down heart beat due to secretion of

Acetylcholine

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Norepinephrine

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Adrenaline

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Dopamine

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Solution

The correct option is A Acetylcholine
Vagus nerve

Vagus nerve is a part of parasympathetic nervous system which helps in normalising body function after release of norepinephrine (emergency hormone).

Function of vagus nerve

Upon receiving stimulus, vagus nerve releases acetylcholine, a neurotransmitter, which binds with various receptors present in the heart. It decreases the heart rate and normalises the body functions.

Final answer: (B) Acetylcholine

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