The period between the filling of the ventricles and the opening of the semilunar valves is called:
A) atrial systole.
B) isovolumetric ventricular contraction.
C) isovolumetric ventricular relaxation.
D) passive ventricular filling.

Question

Quizplus · Accepted Answer

Isovolumetric ventricular contraction is the phase in the cardiac cycle where the ventricles contract with no change in volume because all valves are closed, occurring right before the semilunar valves open to allow ejection of blood into the arteries.

The Period Between the Filling of the Ventricles and the Opening