NEET Zoology Cardiac Cycle Assertion Reason Question
Assertion (A): During ventricular diastole, the semilunar valves close to prevent backflow of blood into the ventricles.
Reason (R): The closure of semilunar valves occurs because the pressure in the ventricles becomes lower than the pressure in the arteries.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false.
Correct Answer
Detailed Explanation
The ventricular diastole causes the ventricular pressure to fall, leading to the closure of semilunar valves which prevents the backflow of blood into the ventricles, as explained in the NCERT context.
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