
💧 Countercurrent Mechanism: How the Nephron Concentrates Urine (Made Simple)
Learn how the nephron’s countercurrent multiplier and exchanger concentrate urine. Includes visual breakdowns and Step 1-style integration for renal physiology.

🧠 Countercurrent Mechanism of the Nephron for USMLE Step 1: Loop of Henle and Urine Concentration
Master the countercurrent multiplier and exchanger systems in the nephron. Learn how the loop of Henle and vasa recta generate concentrated urine for USMLE Step 1.