Solved UPSC CDS/OTA Question
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Q · Circulatory Systemmedium · 45s
What is the role of the atrioventricular (AV) node?
TopicCirculatory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The AV node delays electrical impulses by ~0.1 second before transmitting to the ventricles via the bundle of His. This pause allows atrial contraction to complete ventricular filling before systole.
Final Answer: Option B - Delay impulse conduction