NEET Zoology Cardiac Cycle MCQ Question
During the cardiac cycle, what is the sequence of events that leads to the closure of the semilunar valves?
Ventricular diastole begins, ventricular pressure falls, semilunar valves close
Ventricular systole begins, ventricular pressure rises, semilunar valves close
Atrial systole begins, atrial pressure rises, semilunar valves close
Atrial diastole begins, atrial pressure falls, semilunar valves close
Correct Answer
Detailed Explanation
According to the NCERT context, the semilunar valves close when the ventricles relax (ventricular diastole) and the ventricular pressure falls.
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