Solved UPSC CDS/OTA Question
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Q · Nervous Systemmedium · 45s
Which neurotransmitter is the main inhibitory transmitter in the brain?
TopicNervous System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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GABA (gamma-aminobutyric acid) binds to GABA_A and GABA_B receptors, increasing Cl⁻ influx or K⁺ efflux, hyperpolarizing the postsynaptic membrane and reducing neuronal excitability.
Final Answer: Option B - GABA