Laboratory values: sodium 128 (normal 135 to 145), potassium 4.2 (normal 3.5 to 5.0), glucose 7.9 (normal 3.9 to 5.6). Which values are outside the normal range?
Answer and explanation
Correct answer: B. Sodium and glucose
- Step 1: Sodium 128 is below 135. Step 2. Glucose 7.9 is above 5.6, while potassium 4.2 is normal. Answer: sodium and glucose. Why not the others: potassium is within its range.
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