NURSING EXAM QUESTIONS
PATHOLOGY AND GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Once the pressure of the ventricles increase that of the arteries, which valves open?
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AV valves
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Semilunar valves
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The aortic valve separates the left ventricle from the aorta, while the pulmonary valve separates the right ventricle from the pulmonary artery. As the ventricles contract, ventricular pressure exceeds arterial pressure, the semilunar valves open and blood is pumped into the major arteries.
Detailed explanation-2: -During the end of ventricular systole the semilunar valves open up.
Detailed explanation-3: -At the end of diastole, the atria contract, squirting a small amount of extra blood into the ventricles. This increases the ventricles’ pressure so that it is now higher than that in the atria, causing the atrioventricular valves (mitral/tricuspid) to close.
There is 1 question to complete.