Question

multiple choice question
the purpose for the delay in the conduction of the action potential from the av node to the bundle branches of the ventricles is to allow _______, before the ventricles contract.
o the pulmonary valves to close
o the atria to complete their filling
o the atria to complete their contraction

Explanation:

The delay in action - potential conduction from the AV node to the ventricular bundle branches allows the atria to complete their contraction. This ensures that all the blood in the atria is pushed into the ventricles before the ventricles contract. The pulmonary valves close after the ventricles start contracting and blood is ejected into the pulmonary artery, and atrial filling occurs mainly during diastole before atrial contraction.

Answer:

O the atria to complete their contraction