First slide

Circulatory Pathways

Question

During early ventricular diastole (isovolumetric relaxation),

Easy

A

AV valves close
B

AV valves open
C

semilunar valves close
D

semilunar valves open

Solution

During early ventricular diastole (isovolumetric relaxation), fall in the ventricular pressure causes the closure of semilunar valves which prevents the backflow of blood into the ventricles. As the ventricular pressure declines further, the tricuspid and bicuspid valves are pushed open by the pressure in the atria exerted by the blood which was being emptied into them by the veins.

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