During the isovolumetric contraction phase of ventricular systole,the
A)atria are contracting and the ventricles are relaxing.
B)atrioventricular valves and semilunar valves are closed.
C)blood is ejected into the great vessels.
D)All of the answers are correct.
E)None of the answers is correct.

Question

Quizplus · Accepted Answer

During the isovolumetric contraction phase of ventricular systole, the atrioventricular valves and semilunar valves are closed. This is because the ventricles are contracting to build pressure but have not yet exceeded the pressure in the great vessels, so no blood is being ejected yet.

During the Isovolumetric Contraction Phase of Ventricular Systole,the