Free NCLEX RN Exam Related

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A client has a tentative diagnosis of myasthenia gravis. The nurse recognizes that myasthenia gravis involves:

  • A. Loss of the myelin sheath in portions of the brain and spinal cord
  • B. An interruption in the transmission of impulses from nerve endings to muscles
  • C. Progressive weakness and loss of sensation that begins in the lower extremities
  • D. Loss of coordination and stiff 'cogwheel' rigidity
Correct Answer: B

Rationale: Myasthenia gravis is caused by autoantibodies blocking acetylcholine receptors, interrupting nerve impulse transmission to muscles, leading to weakness.