Solved UPSC CDS/OTA Question
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Q · Nervous Systemmedium · 45s
Which reflex involves only two neurons (sensory and motor)?
TopicNervous System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The monosynaptic stretch reflex (e.g., patellar tendon reflex) consists of a sensory afferent synapsing directly on a motor efferent in the spinal cord, producing rapid muscle contraction without interneurons.
Final Answer: Option B - Stretch reflex (knee-jerk)