What is the primary mechanism by which the kidneys regulate electrolyte balance in the body, particularly in relation to sodium and potassium?

A Glomerular filtration and tubular reabsorption ✓
B Tubular secretion and reabsorption
C Countercurrent multiplication in the loop of Henle
D Aldosterone-mediated sodium retention

Explanation

The kidneys regulate electrolyte balance primarily through glomerular filtration and tubular reabsorption, adjusting the amount of sodium and potassium in the body.

Source

Guyton and Hall Textbook of Medical Physiology
Electrolytes and Acid-Base Balance Physiology Renal Physiology Medium MEDICAL Confidence: high