Adult Health Nursing Test Bank Related

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A patient presents with muscle weakness and fatigue. Upon further examination, it is revealed that the patient has decreased acetylcholine receptors at the neuromuscular junction. Which of the following conditions is most likely responsible for this presentation?

  • A. Myasthenia gravis
  • B. Amyotrophic lateral sclerosis (ALS)
  • C. Guillain-Barre syndrome
  • D. Muscular dystrophy
Correct Answer: A

Rationale: The correct answer is A: Myasthenia gravis. In myasthenia gravis, there is a decrease in acetylcholine receptors at the neuromuscular junction, leading to muscle weakness and fatigue. This occurs due to autoimmune destruction of these receptors. ALS (B) affects motor neurons, not acetylcholine receptors. Guillain-Barre syndrome (C) is an autoimmune disorder affecting peripheral nerves, not neuromuscular junctions. Muscular dystrophy (D) is a genetic disorder causing muscle degeneration, not affecting acetylcholine receptors.