Physiology The primary driving force for counter current Multiplier system is:(2018) A Medullary hyperosmolarity B Reabsorption of Na+ in thick ascending limb C Action of ADH aquaporin channels D Urea recycling 💡 Explanation The primary driving force for counter current Multiplier system is:(2018) ✓ Correct Answer: A. Medullary hyperosmolarity