The shutting of the semilunar valves occurs during which phase?
A) Isovolumetric contraction
B) Ventricular ejection
C) Isovolumetric relaxation
D) Atrial contraction and ventricular filling
E) Late ventricular diastole

Question

Quizplus · Accepted Answer

The semilunar valves close during isovolumetric relaxation, marking the end of ventricular systole and the beginning of diastole, preventing backflow into the ventricles.

The Shutting of the Semilunar Valves Occurs During Which Phase