Drugs that treat myasthenia gravis increase the levels of which neurotransmitter?

Myasthenia gravis disrupts communication between nerves and muscles because antibodies interfere with acetylcholine receptors. Common treatments inhibit the enzyme acetylcholinesterase, which normally breaks down acetylcholine, so acetylcholine levels at the neuromuscular junction increase. The correct choice is acetylcholine.

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