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.

Question

Quizplus · Accepted Answer

Botox works by inhibiting the release of acetylcholine, which is needed for muscle contraction. Therefore, if inhibition occurs at a neuromuscular junction, muscle contraction will cease.

Botulinum Toxin Inhibits the Presynaptic Release of Acetylcholine