Nursing Elites

1. Which type of cell is responsible for producing antibodies in the immune system?

• A. B lymphocytes
• B. T lymphocytes
• C. Macrophages
• D. Neutrophils

Correct answer: A

Rationale: The correct answer is A: B lymphocytes. B lymphocytes (B cells) are a crucial part of the adaptive immune system. They produce antibodies, which are proteins that specifically target and neutralize pathogens such as bacteria and viruses. T lymphocytes (choice B) are involved in cell-mediated immunity rather than antibody production. Macrophages (choice C) are phagocytic cells that engulf and digest pathogens but do not produce antibodies. Neutrophils (choice D) are a type of white blood cell that primarily function in the innate immune response by phagocytosing pathogens.

2. 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.

3. What is the primary reason for applying sequential compression devices (SCDs) to a patient’s legs postoperatively?

• A. To prevent deep vein thrombosis (DVT)
• B. To promote wound healing
• C. To reduce postoperative pain
• D. To maintain body temperature

Correct answer: A

Rationale: The correct answer is A: To prevent deep vein thrombosis (DVT). Sequential compression devices (SCDs) are used postoperatively to prevent DVT by promoting blood circulation in the legs. This helps reduce the risk of blood clots forming in the deep veins of the legs. Choice B, to promote wound healing, is incorrect as SCDs are primarily used for circulatory purposes rather than wound healing. Choice C, to reduce postoperative pain, is incorrect as the primary purpose of SCDs is not pain management but rather prevention of DVT. Choice D, to maintain body temperature, is incorrect as SCDs are not designed for regulating body temperature but for preventing circulatory issues.

4. A nurse is reviewing the basal body temperature method with a couple. Which of the following statements would indicate that the teaching has been successful?

• A. I don't need to buy a special type of thermometer.
• B. I need to wait 5 minutes after smoking a cigarette before I take my temperature.
• C. I need to take my temperature before I get out of bed in the morning.
• D. I need to take my temperature at least once every day.

Correct answer: C

Rationale: The correct answer is C. Basal body temperature must be taken before getting out of bed in the morning to get an accurate reading, as even slight activity can raise body temperature and affect the results. Choice A is incorrect because a special type of thermometer is not required for basal body temperature measurement. Choice B is incorrect because smoking can affect body temperature, but the timing mentioned is not relevant to basal body temperature measurement. Choice D is incorrect because while it is essential to take the temperature consistently each day, the duration of temperature measurement is not specified, making this choice less specific compared to the correct answer.

5. A client post-coronary artery bypass graft (CABG) surgery is concerned about the risk of infection. What is the most important preventive measure the nurse should emphasize during discharge teaching?

• A. Avoid touching the incision sites with bare hands.
• B. Take all prescribed antibiotics as directed.
• C. Report any signs of infection to the healthcare provider immediately.
• D. Keep the incision sites clean and dry.

Correct answer: D

Rationale: The correct answer is D: 'Keep the incision sites clean and dry.' After CABG surgery, maintaining the cleanliness and dryness of the incision sites is crucial to prevent infections. This practice reduces the risk of introducing harmful microorganisms to the surgical wound, promoting healing and preventing complications. Option A, while important, does not fully encompass the preventive measures necessary to avoid infections post-surgery. Option B is significant if antibiotics are prescribed, but ensuring cleanliness directly addresses infection prevention. Option C is reactive and focuses on addressing infection after it occurs, rather than proactively preventing it.

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