A patient with severe diarrhea presents with hypokalemia and metabolic acidosis. Which of the following ions is most likely to be increased in the patient's urine?

A Ammonium (NH4+) ✓
B Sodium (Na+)
C Potassium (K+)
D Chloride (Cl-)

Explanation

In metabolic acidosis, the kidneys increase the excretion of ammonium ions to help eliminate excess hydrogen ions.

Source

Harrison's Principles of Internal Medicine
Electrolytes and Acid-Base Balance Pathophysiology Acid-Base Disturbances Hard MEDICAL Confidence: high