Annually, more than two million people in the United States have elected to be injected with botulinum toxin A in order to diminish frown lines and make their facial skin appear smoother and younger looking. The toxin paralyzes the injected facial muscles because it
A) inhibits acetylcholine binding
B) inhibits acetylcholine receptor formation
C) competes for the acetylcholine binding site
D) interferes with acetylcholine synthesis
E) interferes with the release of acetylcholine

Question

Quizplus · Accepted Answer

Botulinum toxin A interferes with the release of acetylcholine, the neurotransmitter responsible for stimulating muscle contraction. By blocking the release of acetylcholine, the toxin effectively paralyzes the injected facial muscles, which leads to diminished frown lines and smoother skin.

Annually, More Than Two Million People in the United States