The AV Node Delay is Beneficial Because

Question

The AV node delay is beneficial because
A) it allows time for the atria to contract.
B) it allows time for the ventricles to contract.
C) it allows time to send feedback to the brain about heartrate.
D) it decreases neural stimulation of the heart.
E) it hyperpolarizes the ventricular cell membranes.

Accepted Answer

The AV node delay allows time for the atria to contract and facilitate the filling of the ventricles with blood before they contract. This increases the efficiency of the heart's pumping action.