Question

8.The bicuspid and tricuspid valves close at the start of. Single choice.

(1 Point)

atrial systole

ventricular systole

atrial diastole

ventricular diastole


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Answer 1

Answer:

atrial distole

Explanation:

Atrial systole occurs at the end of ventricular diastole. After the ventricle has pumped its blood, it begins to relax. There is now negative pressure in the ventricle (since it is now empty), and this pressure helps to draw in the blood from the atrium when it enters into systole. So during atrial systole, the bicuspid and tricuspid valves are open, and the pulmonary/aortic semilunar valves are closed. Then during the diastole, the bicuspid and tricuspid valves are closed.