Solved UPSC CDS/OTA Question
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Q · Circulatory Systemmedium · 45s
Which valve prevents backflow of blood from the aorta into the left ventricle?
TopicCirculatory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The aortic valve, a semilunar valve with three cusps, opens during left ventricular systole to allow ejection into the aorta and closes in diastole to prevent blood returning to the ventricle, maintaining unidirectional flow.
Final Answer: Option D - Aortic valve