HESI PN Exit Exam 2023 Related

Review HESI PN Exit Exam 2023 related questions and content

Which disorder is characterized by demyelination of neurons in the central nervous system?

  • A. Multiple sclerosis
  • B. Parkinson's disease
  • C. Alzheimer's disease
  • D. Huntington's disease
Correct Answer: A

Rationale: Multiple sclerosis is the correct answer. It is an autoimmune disease that specifically targets and damages the myelin sheath surrounding neurons in the central nervous system. This demyelination disrupts the transmission of nerve signals and leads to a variety of neurological symptoms. Parkinson's disease (Choice B), Alzheimer's disease (Choice C), and Huntington's disease (Choice D) are neurodegenerative disorders that do not primarily involve demyelination of neurons in the CNS. Parkinson's disease is characterized by the loss of dopamine-producing neurons, Alzheimer's disease by the formation of plaques and tangles in the brain, and Huntington's disease by a genetic mutation affecting nerve cells.