Nursing Elites

1. What is the primary role of the sinoatrial (SA) node in the heart?

• A. Pacemaker of the heart
• B. Blood pressure regulation
• C. Electrical conduction delay
• D. Stimulating muscle contraction

Correct answer: A

Rationale: The correct answer is A: Pacemaker of the heart. The SA node, known as the natural pacemaker, initiates the electrical impulses that set the rhythm for the heartbeat. It is responsible for coordinating the heart's contractions by generating electrical signals at regular intervals. Choice B is incorrect as the SA node's primary function is not related to blood pressure regulation. Choice C is incorrect as the SA node does not cause electrical conduction delay but rather initiates and conducts the electrical impulses. Choice D is incorrect as the SA node does not directly stimulate muscle contraction but rather initiates the electrical events that lead to muscle contraction.

2. A female client taking a liquid iron preparation expresses concern that her tooth color has darkened since starting the medication. What action should the PN implement?

• A. Teach the client to use a straw when taking the medication to reduce further tooth staining
• B. Advise the client to withhold further doses until consulting with the healthcare provider
• C. Reassure the client that this change indicates the medication is having the desired effect
• D. Determine if the client is also experiencing mouth or gum pain and difficulty swallowing

Correct answer: A

Rationale: The correct action for the PN to implement is to teach the client to use a straw when taking the medication to reduce further tooth staining. Using a straw minimizes contact between the iron preparation and the teeth, helping prevent additional staining. Choice B is incorrect because withholding doses without consulting the healthcare provider could be detrimental to the client's health. Choice C is incorrect because darkening of tooth color is not an expected effect of liquid iron preparation and should not be reassured as a desired effect. Choice D is incorrect as it does not directly address the client's concern about tooth staining.

3. 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.

4. The PN notes that an older female client has developed a nonproductive cough and seems more confused than the previous day. Vital signs are temperature 99.8°F, pulse 94, respirations 22, and B/P 108/54. Which intervention is most important for the PN to implement?

• A. Report the findings to the charge nurse
• B. Monitor the client's temperature hourly
• C. Offer the client fluids frequently
• D. Provide care to moisten oral mucosa

Correct answer: A

Rationale: The change in the client’s condition, especially confusion and a new cough, may indicate the onset of an infection such as pneumonia, which requires immediate attention. Reporting to the charge nurse ensures prompt evaluation and intervention. Monitoring the client's temperature hourly (Choice B) could be important but not the most critical at this point. Offering the client fluids frequently (Choice C) and providing care to moisten oral mucosa (Choice D) are not the priority interventions when facing potential signs of infection and confusion in the client.

5. A client with a recent total knee replacement is scheduled for physical therapy. The client refuses to participate, stating that the pain is too intense. What should the nurse do first?

• A. Administer the prescribed analgesic and encourage participation after it takes effect.
• B. Reschedule the physical therapy session for later in the day.
• C. Explain the importance of physical therapy for recovery.
• D. Notify the physical therapist of the client's refusal.

Correct answer: A

Rationale: Administering pain medication before physical therapy helps manage the pain, making it easier for the client to participate in the necessary exercises to improve recovery and prevent complications such as joint stiffness. Choice B is not the first step as addressing the pain should take precedence. Choice C is important but should come after managing the pain to facilitate participation. Choice D involves another healthcare provider and is not the immediate action needed in this situation.

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