PHYSIOLOGY
GENERAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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prevents blood from returning to the right atrium.
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prevents blood from returning to the left atrium.
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prevents blood from returning to the right ventricle.
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prevents blood from returning to the left ventricle.
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Detailed explanation-1: -The semilunar valves act to prevent backflow of blood from the arteries to the ventricles during ventricular diastole and help maintain pressure on the major arteries. The aortic semilunar valve separates the left ventricle from the opening of the aorta.
Detailed explanation-2: -Aortic valve: Allows blood to pass from the left ventricle to the aorta; prevents backflow of blood into the left ventricle.
Detailed explanation-3: -When the ventricles contract, the blood should go out of the heart and not back to the atrium. This backflow of blood is prevented by valves. Tricuspid valve prevents backflow of blood from right ventricle to right atrium. Bicuspid valve prevents backflow of blood from left ventricle to left atrium.
Detailed explanation-4: -The semilunar valves permit blood to flow into the arteries from the ventricles and prevent the backward flow of blood from the arteries into the ventricles.
Detailed explanation-5: -Answer and Explanation: The valve that prevents blood flowing back into the left atrium from the left ventricle is B. The bicuspid valve (Mitral valve).