In what phase is the cardiac cycle when the AV valves are open and semilunar valves are closed?
A) atrial contraction
B) ventricular filling
C) isovolumetric contraction
D) isovolumetric relaxation
E) ventricular ejection

Question

Quizplus · Accepted Answer

During ventricular filling, the atrioventricular (AV) valves are open to allow blood to flow from the atria into the ventricles, while the semilunar valves are closed to prevent backflow into the atria.

In What Phase Is the Cardiac Cycle When the AV