What is the primary mechanism by which the kidneys regulate potassium levels in the body?

A Sodium-potassium pump
B Potassium excretion in the urine ✓
C Aldosterone-mediated potassium retention
D Potassium absorption in the gut

Explanation

The kidneys play a crucial role in maintaining potassium balance by regulating its excretion in the urine. This is achieved through various mechanisms, including the renin-angiotensin-aldosterone system.

Source

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