A nurse is providing care to a patient experiencing a multisystem disease process. Because it is the main extracurricular cation, and is the primary electrolyte involved in determining body fluid volumes, the nurse monitors the laboratory values of which of the following electrolytes?
Calcium
Sodium
Potassium
Bicarbonate
The Correct Answer is B
A. Calcium: Important for neuromuscular function but not fluid balance.
B. Sodium: Sodium is the main extracellular cation and is vital in controlling extracellular fluid volume.
C. Potassium: Potassium is the main intracellular cation.
D. Bicarbonate: It's an important buffer but not the main determinant of fluid volume.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. young adults: They have a relatively high percentage of body water (50–60%).
B. children: Children have more body water than adults.
C. infants: Infants have the highest body water content (~70–80%).
D. elderly adults: Aging leads to a decrease in lean body mass and total body water.
Correct Answer is D
Explanation
A. Phosphate: Phosphate is mainly found intracellularly.
B. Potassium: Potassium is a cation, not an anion.
C. Calcium: Calcium is a cation.
D. Chloride: Chloride is the most abundant extracellular anion and important in fluid balance.
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