NEET Zoology Cardiac Cycle MCQ Question
Which combination of statements about the cardiac cycle is correct?
The semilunar valves open during ventricular diastole; the atrioventricular valves close due to atrial pressure.
Ventricular pressure decreases during ventricular diastole; the atrioventricular valves open to allow blood flow from atria.
The semilunar valves prevent backflow into the ventricles during atrial systole; the ventricles contract to push blood into the arteries.
The atrioventricular valves are closed when the ventricles are relaxed; blood flows from the ventricles into the atria.
Correct Answer
Detailed Explanation
During ventricular diastole, the ventricular pressure decreases, causing the atrioventricular valves to open and allowing blood to flow from the atria into the ventricles.
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