D–tubocurarine acts by –: (A) Inhibiting nicotinic receptors at myoneural junction, (B) Inhibiting nicotinic receptors at autonomic ganglion, (C) Producing depolarizing block, (D) By inhibiting reuptake of acetylcholine
Answer is A. All non-depolarizing blockers (D-tubocurarine) act as competitive antagonist of acetylcholine on nicotinic (Nm) receptors at myoneural junction.