Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 11 PCB MCQ (Single Correct)

End of Atrial systole of cardiac cycle is immediately followed by

A
isovolumetric relaxation
B
isovolumetric contraction
C
ventricular diastole
D
joint diastole.

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The correct answer is:
B

At the end of atrial systole, the blood is pushed into the ventricles, making them completely filled. Immediately after this, the ventricles start contracting but both the AV valves and semilunar valves remain closed for a brief moment. This phase is called isovolumetric contraction.

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