What is the primary mechanism by which the kidneys regulate pH balance in the body?

A Excretion of hydrogen ions ✓
B Reabsorption of bicarbonate ions
C Excretion of potassium ions
D Reabsorption of sodium ions

Explanation

The kidneys play a crucial role in maintaining acid-base balance by excreting excess hydrogen ions, which helps to regulate pH levels in the body.

Source

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