Neuromuscular disorders · Physiology

Myasthenia gravis is primarily caused by antibodies against which structure at the neuromuscular junction?

  1. Voltage-gated sodium channels
  2. Acetylcholine receptors
  3. Acetylcholinesterase enzyme
  4. Calcium channels
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Correct answer: Acetylcholine receptors

Myasthenia gravis is an autoimmune disorder targeting postsynaptic acetylcholine receptors. This reduces neuromuscular transmission and causes muscle weakness.

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