Mechanism of action of tetanospasmin: (A) Inhibition of GABA release, (B) Inhibition cAMP, (C) Inactivation of Ach receptors, (D) Inhibition of cGMP
Answer is A. Ans. is 'a' i.e., Inhibition of GABA release . Tetanospasmin blocks the release of inhibitory neurotransmitters (GABA and glycine) in brain-stem and spinal cord.