Home Biology Body Fluids and Circulation Previous Year Questions Which one of the following statements is cor…
Biology Body Fluids and Circulation Previous Year Questions Single Correct MCQ
Published on: August 21, 2026

Which one of the following statements is correct?

A
Increased ventricular pressure causes closing of the semilunar valves
B
The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction
C
The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria
D
Blood moves freely from atrium to the ventricle during joint diastole.

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The correct answer is:

                    

During joint diastole, 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. The blood now once again moves freely to the ventricles.

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