Closure of aortic valve occurs before the following event_______________?
Correct answer: B. Isovolumetric relaxation
- A. Isovolumetric contraction
- B. Isovolumetric relaxation
- C. Pre-diastole
- D. Pre-systole
Explanation
Aortic valve closure marks the start of isovolumetric ventricular relaxation, when all valves are briefly closed and ventricular pressure falls rapidly. Thus it occurs immediately before that phase.
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