Skeletal System: Bones, Joints, Cartilage · NCERT Biology

Which autoimmune disorder affects the neuromuscular junction leading to fatigue, weakening, and paralysis of skeletal muscle?

  1. Muscular dystrophy
  2. Myasthenia gravis
  3. Tetany
  4. Arthritis
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Correct answer: Myasthenia gravis

Myasthenia gravis is an autoimmune disorder where antibodies destroy the receptors for acetylcholine at the neuromuscular junction. This prevents normal muscle contraction and leads to progressive weakness.

Difficulty: Medium Question 19 of 20

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