Neurotoxin of tetanus acts on______________?
Correct answer: D. Spinal card
- A. Synapse
- B. Muscle
- C. Brain
- D. Spinal card
Explanation
Tetanospasmin blocks inhibitory neurotransmitter release from interneurons in the spinal cord, particularly glycine and GABA. Loss of this inhibition causes sustained muscle spasm and rigidity.
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