Heartbeat increases due to the stimulation of | vedclass

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(A) The heart rate is regulated by the autonomic nervous system and endocrine hormones. $1$. The sympathetic nervous system increases the heart rate b

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Sympathetic nerves and adrenaline

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(A) The heart rate is regulated by the autonomic nervous system and endocrine hormones. $1$. The sympathetic nervous system increases the heart rate by releasing norepinephrine,which acts on the heart. $2$. Adrenaline (also known as epinephrine),secreted by the adrenal medulla,also increases the heart rate and cardiac output during stress or 'fight-or-flight' responses. $3$. Conversely,the parasympathetic nervous system and acetylcholine decrease the heart rate. Therefore,the combination of sympathetic nerves and adrenaline is responsible for increasing the heartbeat.

Heartbeat increases due to the stimulation of:

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