HESI LPN
CAT Exam Practice Test
1. Which type of Leukocyte is involved with allergic responses and the destruction of parasitic worms?
- A. Neutrophils
- B. Lymphocytes
- C. Eosinophils
- D. Monocytes
Correct answer: C
Rationale: Eosinophils are the correct answer. Eosinophils are specialized white blood cells that play a crucial role in allergic responses and combating parasitic infections. They release substances to destroy parasites and modulate allergic reactions. Neutrophils (Choice A) are mainly involved in fighting bacterial infections. Lymphocytes (Choice B) play a key role in the immune response, including antibody production, but are not primarily responsible for combating parasites or allergic responses. Monocytes (Choice D) are involved in immune defense, differentiating into macrophages or dendritic cells, but they are not mainly associated with allergic responses or parasitic worm destruction.
2. A female client has been taking a high dose of prednisone, a corticosteroid, for several months. After stopping the medication abruptly, the client reports feeling very tired. Which nursing intervention is most important for the nurse to implement?
- A. Measure vital signs
- B. Auscultate breath sounds
- C. Palpate the abdomen
- D. Observe the skin for bruising
Correct answer: A
Rationale: Discontinuing prednisone abruptly can lead to adrenal insufficiency, which may result in symptoms such as fatigue. Monitoring vital signs is crucial in this situation to assess for potential complications like hypotension, which can be a sign of adrenal insufficiency. Auscultating breath sounds (choice B) is important but not the priority when considering the risk of adrenal insufficiency. Palpating the abdomen (choice C) and observing the skin for bruising (choice D) are not directly related to the potential complications of abruptly stopping prednisone.
3. A newborn whose mother is HIV positive is admitted to the nursery from labor and delivery. Which action should the nurse implement first?
- A. Initiate treatment with zidovudine (ZDV) syrup at 2 mg per kg
- B. Bathe the infant with dilute chlorhexidine (Hibiclens) or soap
- C. Measure and record the infant's frontal-occipital circumference
- D. Administer vitamin K (AquaMEPHYTON) IM in the vastus lateralis
Correct answer: B
Rationale: The correct first action for a newborn potentially exposed to HIV is to bathe the infant with dilute chlorhexidine or soap. This helps reduce the risk of infection. Initiating treatment with zidovudine would be important but not the first priority. Measuring and recording the infant's frontal-occipital circumference and administering vitamin K are important tasks but are not the priority when dealing with potential HIV exposure. Immediate hygiene measures are crucial to minimize the risk of transmission.
4. The nurse is teaching a male adolescent recently diagnosed with type 1 diabetes mellitus (DM) about self-injecting insulin. Which approach is best for the nurse to use to evaluate the effectiveness of the teaching?
- A. Observe him demonstrating the self-injection technique to another diabetic adolescent.
- B. Ask the adolescent to describe his comfort level with injecting himself with insulin.
- C. Review his glycosylated hemoglobin level 3 months after the teaching session.
- D. Have the adolescent list the steps for safe insulin administration.
Correct answer: C
Rationale: Reviewing the glycosylated hemoglobin level after a few months is the best approach to evaluate the effectiveness of teaching self-injection. This measurement provides an objective indicator of the adolescent's glucose control over time, reflecting the impact of insulin self-administration education. Choices A, B, and D do not directly assess the long-term impact of the teaching on the adolescent's diabetes management.
5. Which client requires careful nursing assessment for signs and symptoms of hypomagnesemia?
- A. A young adult client with intractable vomiting from food poisoning
- B. A client who developed hyperparathyroidism in late adolescence
- C. A middle-aged male client in renal failure following an unsuccessful kidney transplant
- D. A female client who is overzealous with her intake of simple carbohydrates
Correct answer: A
Rationale: The correct answer is A. Vomiting can lead to significant loss of magnesium, causing hypomagnesemia. In this scenario, the young adult client with intractable vomiting from food poisoning is at higher risk of developing hypomagnesemia due to the loss of magnesium through vomiting. Choices B, C, and D are less likely to present with hypomagnesemia. Hyperparathyroidism (B) is associated with hypercalcemia, renal failure (C) can lead to hypermagnesemia, and overconsumption of simple carbohydrates (D) is not directly linked to magnesium imbalances.
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