The Second Heart Sound is Heard During Which Phase of the Cardiac

Question

The second heart sound is heard during which phase of the cardiac cycle?
A) isovolumetric contraction
B) ventricular ejection
C) isovolumetric relaxation
D) ventricular filling

Accepted Answer

The second heart sound is the "dup" sound that occurs during isovolumetric relaxation, when the aortic and pulmonary valves close at the end of ventricular systole and beginning of diastole.