The current study indicates that, despite differences in acetylcholinesterase activity between the diaphragm and EDL, the diaphragmatic resistance to tubocurarine cannot be explained by the different rate of acetylcholine hydrolysis in the synaptic cleft.
The current study indicates that the resistance of the diaphragm to neuromuscular blocking agents can be explained by both a higher mean quantal content of endplate potentials and a higher number of nicotinic acetylcholine receptor binding sites than in the peripheral EDL muscle.
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