During the Isovolumetric Relaxation Phase of the Cardiac Cycle__________

Question

During the isovolumetric relaxation phase of the cardiac cycle__________, .
A) atrioventricular valves are closed; aortic and pulmonary valves are open
B) atrioventricular, aortic, and pulmonary valves are open
C) atrioventricular, aortic, and pulmonary valves are closed
D) atrioventricular valves are open; aortic and pulmonary valves are closed

Accepted Answer

During the isovolumetric relaxation phase of the cardiac cycle, all valves (atrioventricular, aortic, and pulmonary) are closed. This phase occurs right after the ventricles have finished contracting and the blood has been ejected into the aorta and pulmonary artery, but before the atrioventricular valves open to allow the next inflow of blood from the atria.