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 tricuspid and bicuspid valves open due to atrial pressure, allowing blood to flow from the atria to the ventricles.
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 but R is true.
Correct Answer
Detailed Explanation
Both statements are true and R correctly explains A. During ventricular diastole, the semilunar valves close to prevent backflow, and atrial pressure facilitates the opening of tricuspid and bicuspid valves for blood flow to the ventricles.
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