In several vertebrates,the rate of heartbeat | vedclass

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(D) Adrenalin (also known as epinephrine) is a hormone secreted by the adrenal medulla in response to stress or excitement.It acts on the heart to inc

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Adrenalin

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(D) Adrenalin (also known as epinephrine) is a hormone secreted by the adrenal medulla in response to stress or excitement.It acts on the heart to increase the heart rate and the force of contraction.It also causes vasoconstriction in certain blood vessels,which leads to an increase in blood pressure.Therefore,Adrenalin is the primary hormone responsible for the 'fight-or-flight' response,which includes increasing cardiac output and blood pressure.

In several vertebrates,the rate of heartbeat and increase in blood pressure is caused by which hormone?

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