A) Calcium ions cannot be taken up by membrane vesicless
B) Cholinesterase cannot remove acetylcholine
C) Post-synaptic membrane receptors are blocked
D) Sodium channels remain open
Correct Answer: C
Solution :Acetylcholine is a neurotransmitter. It transmits message across the synapse (excitatory synapse). The drug curare blocks the post-synaptic membrane receptors, so that the muscles remain relaxed during surgical operations.
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