Biology, asked by Sagar2139, 1 year ago

Automatic nervous system With respect to their effect on heart un

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Answered by Sweetbuddy

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Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate.

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