Botulinum Toxin Inhibits the Presynaptic Release of Acetylcholine

question 71

Multiple Choice

Botulinum toxin inhibits the presynaptic release of acetylcholine. If inhibition occurs at a neuromuscular junction, then

• A)the synaptic cleft will close.
• B)muscle contraction will cease.
• C)the post-synaptic cell will die.
• D)muscles will spasm.
• E)receptor ion channels will remain open.

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