ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During systole what valves are open?
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Semi-lunar valves
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AV Valves
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Both the semi-lunar valves and the AV valves
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None of the above
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Explanation:
Detailed explanation-1: -During ventricular systole bicuspid and tricuspid valve become closed while semilunar valves are forced open.
Detailed explanation-2: -A semilunar valve is the heart valve at the base of the aorta and the pulmonary artery, and consisting of cusps or flaps that prevent the backflow of the blood during systole. Semilunar valves are paired valves of the heart at the bases of the aorta and the pulmonary artery.
Detailed explanation-3: -Rapid ejection (b-c): As the semilunar valves open at point (b), there is a rapid ejection of blood due to increased ventricular contractility. The arterial pressure increases until reaching its maximum at point (c). This phase usually lasts for 13% of the cardiac cycle.
There is 1 question to complete.