In the heart, as the action potential reaches | vedclass

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Question

(C) The $SA$ node (sinoatrial node) acts as the pacemaker of the heart, initiating the electrical impulse.When this action potential reaches the $AV$

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It allows ventricles to receive all the blood from the atria.

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(C) The $SA$ node (sinoatrial node) acts as the pacemaker of the heart, initiating the electrical impulse.When this action potential reaches the $AV$ node (atrioventricular node), there is a physiological delay of approximately $0.1$ seconds.This delay is crucial because it ensures that the atria have sufficient time to complete their contraction (atrial systole) and empty their blood contents into the ventricles before the ventricles begin to contract.If this delay did not occur, the atria and ventricles might contract simultaneously, which would significantly reduce the efficiency of blood pumping.

In the heart, as the action potential reaches the $AV$ node from the $SA$ node, there is a delay of the action potential. This delay is important because:

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