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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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It allows atria to rest.

It allows a stronger right atrial contraction.

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

It allows right atria to receive the blood from venacava.

answer is C.

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Detailed Solution

To allow atria to contract fully so that ventricles will receive all the blood from atria

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