NCLEX RN Practice Exam Related

Review NCLEX RN Practice Exam related questions and content

A 22-year-old woman has just been diagnosed with myasthenia gravis. She asks the nurse what causes this disease. The most accurate response from the nurse is

  • A. This is a disease caused by a chromosomal defect in utero. It is a structural abnormality in the chromosome that causes nerve cells in your body to become inflamed and not function properly.'
  • B. This is an autoimmune disease in which antibodies attack the muscles and muscle atrophy occurs. The muscles will become weak and begin to waste.'
  • C. This is an autoimmune disease in which antibodies destroy acetylcholine at the neuromuscular junction. This prevents your muscles from contracting normally.'
  • D. This is a hereditary condition caused by a recessive gene. It causes nervous tissue to be broken down, and damage occurs to the brain and spinal cord.'
Correct Answer: C

Rationale: Myasthenia gravis is an autoimmune disorder where antibodies attack acetylcholine receptors at the neuromuscular junction, impairing muscle contraction.