Which one of the following nerves inhibit the rate of heart beat?

Vagus

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Sympathetic

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Oculomotor

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None of the above

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Solution

The correct option is A Vagus
Parasympathetic (vagal) activation reduces the resting heart rate down to 60-80 beats/min. Inhibition of vagal tone is necessary for the sympathetic nerves to increase heart rate, because vagal influences inhibit the action of sympathetic nerve activity.

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