Heartbeat increases due to the stimulation of | vedclass

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(A) The heart rate is regulated by the autonomic nervous system. $1$. The sympathetic nervous system increases the heart rate and the strength of vent

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Sympathetic nerves and adrenaline

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(A) The heart rate is regulated by the autonomic nervous system. $1$. The sympathetic nervous system increases the heart rate and the strength of ventricular contraction. $2$. Adrenaline (also known as epinephrine),secreted by the adrenal medulla,also stimulates the heart,increasing both the heart rate and the cardiac output. $3$. Conversely,the parasympathetic nervous system and neurotransmitters like acetylcholine decrease the heart rate. Therefore,the correct combination that increases the heartbeat is sympathetic nerves and adrenaline.

Heartbeat increases due to the stimulation of .......

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