Surgery Which of the following is true of botulinum toxin? A It is an endotoxin B It acts on the postsynaptic membrane of peripheral nerves to block acetylcholine receptors C It is a neurotoxin, which primary affects the central nervous system D It is a relatively weak neurotoxin 💡 Explanation Which of the following is true of botulinum toxin? ✓ Correct Answer: B. It acts on the postsynaptic membrane of peripheral nerves to block acetylcholine receptors