Physiology The high sodium content of the filtrate in renal medulla is because: A At the loop of Henle, there is counter current mechanism B Increased blood flow to vasarecta C Increased excretion of Na* from PCT D Increased absorption of Na from PCT 💡 Explanation The high sodium content of the filtrate in renal medulla is because: ✓ Correct Answer: A. At the loop of Henle, there is counter current mechanism