which disorder is characterized by demyelination of neurons in the central nervous system
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HESI PN Exit Exam 2023

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

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.

2. Which of the following is a priority for the nurse to include in the teaching of a client who was recently prescribed alprazolam (Xanax) as an oral medication?

Correct answer: D

Rationale: The correct answer is D: 'Avoid alcohol.' Alprazolam (Xanax) can have central nervous system depressant effects, which are exacerbated by alcohol. It is crucial to avoid alcohol while taking this medication to prevent severe sedation and respiratory depression. Monitoring heart rate (choice A) is not directly related to alprazolam administration. Monitoring temperature daily (choice B) is not a priority teaching point for a client prescribed alprazolam. Avoiding unprotected exposure to sunlight (choice C) is not specifically linked to the use of alprazolam.

3. The nurse is caring for a client with pericarditis. Which of the following nursing interventions will promote comfort for the client?

Correct answer: B

Rationale: Providing a diversionary activity is the most appropriate nursing intervention to promote comfort for a client with pericarditis. This intervention helps to distract the patient and reduce discomfort by focusing their attention elsewhere. Auscultating heart sounds, while important for monitoring the condition, does not directly address the client's comfort. Encouraging deep breathing can be beneficial for some conditions but may not be specifically aimed at promoting comfort in pericarditis. Maintaining a patent intravenous access is essential for treatment access and management of the condition, but it does not directly promote comfort for the client.

4. An adult female client with type 1 diabetes mellitus is receiving NPH insulin 35 units in the morning. Which finding should the nurse document as evidence that the amount of insulin is inadequate?

Correct answer: C

Rationale: The correct answer is C. Consistently high evening glucose levels indicate that the current insulin dosage is inadequate to maintain proper glucose control. Choice A is incorrect because cold and numb feet are more indicative of peripheral vascular disease rather than inadequate insulin dosage. Choice B describes a wound that may be related to poor circulation or neuropathy but not necessarily inadequate insulin dosage. Choice D suggests gastrointestinal issues that are not directly related to insulin dosage adequacy.

5. The nurse is caring for an elderly female client who tells the nurse, 'When I sneeze, I wet my pants.' After discussing the client's complaint with the charge nurse, the nurse plans to reinforce teaching about the importance of Kegel exercises. What muscles are involved in these exercises?

Correct answer: D

Rationale: Kegel exercises involve the pelvic floor muscles. These muscles help strengthen the muscles controlling urination, potentially reducing symptoms of urinary incontinence. Pectoral muscles (Choice A), responsible for movement of the shoulders and arms, are not involved in Kegel exercises. Buttock muscles (Choice B) are primarily responsible for hip movement and stability, not related to Kegel exercises. Abdominal muscles (Choice C) support the core and trunk but are not the focus of Kegel exercises.

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