NEET Zoology Cardiac Cycle MCQ Question
Which of the following statements about the cardiac cycle is correct?
The closure of the semilunar valves prevents backflow of blood into the ventricles during diastole.
The tricuspid and bicuspid valves remain closed during ventricular diastole.
Blood flows from the atria to the ventricles when the ventricular pressure is higher than atrial pressure.
The semilunar valves open when the ventricular pressure is lower than the atrial pressure.
Correct Answer
Detailed Explanation
During diastole, the closure of the semilunar valves prevents backflow of blood into the ventricles as the ventricular pressure falls. This process allows the tricuspid and bicuspid valves to open, facilitating blood flow from the atria to the ventricles.
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