ATI RN
ATI Anatomy and Physiology
1. Which of the following ions is most abundant in extracellular fluid?
- A. Calcium
- B. Chloride
- C. Sodium
- D. Potassium
Correct answer: C: Sodium
Rationale: Sodium is the most abundant ion in extracellular fluid. It plays a crucial role in maintaining fluid balance, nerve function, and muscle contraction. Calcium (Choice A) is mainly found in bones and teeth, Chloride (Choice B) is the major anion in extracellular fluid but not the most abundant ion, and Potassium (Choice D) is found predominantly inside cells.
2. A healthcare professional is preparing to administer clindamycin 200 mg by intermittent IV bolus. The amount available is clindamycin injection 200 mg in 100 mL 0.9% sodium chloride (0.9% NaCl) to infuse over 30 min. The healthcare professional should set the IV pump to deliver how many mL/hr?
- A. 200 mL/hr
- B. 150 mL/hr
- C. 100 mL/hr
- D. 250 mL/hr
Correct answer: A
Rationale: To calculate the flow rate in mL/hr: (Volume in mL / Time in hours) = Flow rate in mL/hr. In this case, (100 mL / 0.5 hr) = 200 mL/hr. The correct calculation is: 100 mL (volume) / 0.5 hr (time) = 200 mL/hr. Therefore, the correct answer is 200 mL/hr. Choice B (150 mL/hr), C (100 mL/hr), and D (250 mL/hr) are incorrect as they do not match the calculated flow rate needed for the administration of clindamycin.
3. What is the first intervention for a patient experiencing anaphylactic shock?
- A. Administer epinephrine
- B. Administer oxygen
- C. Administer corticosteroids
- D. Administer antihistamines
Correct answer: A
Rationale: The correct answer is to administer epinephrine. Epinephrine is the first-line treatment for anaphylactic shock as it helps reverse the severe allergic reaction by constricting blood vessels, increasing heart rate, and opening airways for improved breathing. Oxygen (Choice B) can be administered after epinephrine to support oxygenation. Corticosteroids (Choice C) may be used to prevent a biphasic reaction but are not the initial intervention. Antihistamines (Choice D) can help with itching and hives but do not address the life-threatening symptoms of anaphylaxis.
4. At what age may an infant close their eyes to bright lights and show improved head control?
- A. 30-33 weeks after conception
- B. 34-36 weeks after conception
- C. Less than 30 weeks after conception
- D. 37-40 weeks after conception
Correct answer: A
Rationale: Around 30-33 weeks after conception, infants usually start closing their eyes in response to bright lights and exhibit enhanced head control. This developmental milestone indicates progress in their visual and motor abilities, reflecting the maturation of their neurological system. As preterm infants continue to grow and develop, they gradually acquire these skills, showcasing the natural progression of their sensory and motor functions.
5. What changes could the school nurse implement at the school to help reduce students’ risk for developing type 2 diabetes?
- A. Increase the amount of daily physical activity.
- B. Decrease the amount of daily physical activity.
- C. Test each child’s urine monthly.
- D. Teach parents to avoid administering aspirin to their child.
Correct answer: A
Rationale: Increasing physical activity helps improve insulin sensitivity and can prevent or delay the onset of type 2 diabetes in children. Regular physical activity is a key component in managing weight and reducing the risk of chronic diseases. Decreasing physical activity (Choice B) would not be beneficial in reducing the risk of type 2 diabetes. Testing each child’s urine monthly (Choice C) is not directly related to preventing type 2 diabetes. Teaching parents to avoid administering aspirin to their child (Choice D) is important for Reye's syndrome prevention but not directly related to reducing the risk of type 2 diabetes.
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