Heart beats are accelerated by:

Cranial nerves and acetylcholine

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Sympathetic nerves and acetylcholine

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Cranial nerves and adrenaline

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Sympathetic nerves and epinephrine

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Solution

The correct option is D Sympathetic nerves and epinephrine
The hormone adrenaline also called epinephrine is known as the stress hormone, this hormone accelerates the heartbeat while acetylcholine decelerates the heartbeat rate.
So, the correct option is 'Sympathetic nerves and epinephrine'.

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Which of the following cranial nerves can regulate heart beat?

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