Question

The beating of the heart is controlled by the __________.​

Answer 1

Answer:

The SA node sets the rate and rhythm of your heartbeat. Normal heart rhythm is often called normal sinus rhythm because the SA (sinus) node fires regularly.

Explanation:

Answer 2

heart rate is controlled by 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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