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 A
Explanation
A. hyperkalemia: Elevated potassium can cause fatal cardiac arrhythmias.
B. hyponatremia: While it can be serious, it typically causes neurologic symptoms and is less immediately life-threatening than hyperkalemia.
C. hypokalemia: Also dangerous but usually less acutely life-threatening than hyperkalemia.
D. hypernatremia: Can cause serious symptoms but not as immediately dangerous to cardiac function.
Correct Answer is B
Explanation
A. sodium: Sodium is the main extracellular cation, not an anion.
B. chloride: Chloride is the main extracellular anion and a component of hydrochloric acid in the stomach.
C. calcium: Calcium is a cation and not primarily associated with gastric acid formation.
D. potassium: Potassium is a major intracellular cation.
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