Question

During which phase of the cardiac cycle are all four heart valves open?

A) ventricular filling
B) isovolumetric contraction
C) ventricular ejection
D) isovolumetric relaxation
E) none

Answer 1

All four heart valves are open during the ventricular ejection phase of the cardiac cycle.

Step-by-step explanation:

In the cardiac cycle, all four heart valves are open during the phase of ventricular ejection. During this phase, the ventricles contract and pump blood out of the heart and into the arteries.