ATI RN
ATI Fluid and Electrolytes
1. Which negative ion is most important in intracellular fluid?
- A. Phosphate ions.
 - B. Protein molecules.
 - C. Chlorine.
 - D. Phosphate ions and protein molecules.
 
Correct answer: D
Rationale: Intracellular fluid contains phosphate ions and protein molecules as essential anions. Phosphate ions play a crucial role in various cellular processes, including energy transfer. Proteins, being large molecules with negative charges, also contribute significantly to the negative ion concentration within cells. Chlorine is primarily an extracellular anion and is not as prominent as phosphate ions and proteins within intracellular fluid, making it a less important negative ion in this context. Therefore, the correct answer is D because both phosphate ions and protein molecules are crucial negative ions in intracellular fluid.
2. What percentage of body water can be as high as in a newborn?
- A. 80%.
 - B. 70%.
 - C. 60%.
 - D. 90%.
 
Correct answer: A
Rationale: The correct answer is A: 80%. Newborns can have a body water content as high as 80% due to their higher total body water compared to adults. Choice B (70%) is incorrect because newborns typically have a higher body water percentage. Choice C (60%) is also incorrect as it underestimates the body water content in newborns. Choice D (90%) is incorrect as it overestimates the body water percentage in newborns.
3. A nurse assesses a client who is experiencing an acid-base imbalance. The clients arterial blood gas values are pH 7.34, PaO2 88 mm Hg, PaCO2 38 mm Hg, and HCO3 19 mEq/L. Which assessment should the nurse perform first?
- A. . Cardiac rate and rhythm
 - B. Skin and mucous membranes
 - C. Musculoskeletal strength
 - D. Level of orientation
 
Correct answer: A
Rationale:
4. A nurse assesses a client who is admitted for treatment of fluid overload. Which manifestations should the nurse expect to find? (Select all that do not apply.)
- A. Increased pulse rate
 - B. . Distended neck veins
 - C. Warm and pink skin
 - D. Skeletal muscle weakness
 
Correct answer: C
Rationale:
5. .A nurse assesses a clients peripheral IV site, and notices edema and tenderness above the site. Which action should the nurse take next?
- A. Apply cold compresses to the IV site.
 - B. Elevate the extremity on a pillow.
 - C. Flush the catheter with normal saline.
 - D. . Stop the infusion of intravenous fluids.
 
Correct answer: D
Rationale:
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