Thermoregulation and Body Fluids · USMLE Step 1

A patient has dehydration from diarrhea. Which electrolyte abnormality is most likely?

  1. Hypernatremia
  2. Hyponatremia
  3. Hypocalcemia
  4. Hyperkalemia
Show answer and explanation

Correct answer: Hypernatremia

Diarrhea causes water loss in excess of sodium, leading to hypernatremia. Plasma osmolality increases.

Difficulty: Medium Question 14 of 20

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