Na⁺ and Cl^- Are Actively Transported Out of the Tubules

Na⁺ and Cl^- are actively transported out of the tubules to help set up the countercurrent multiplier. Sites of active Na⁺ and Cl^- transport in the nephron are _______ and the _______.

A) Bowman's capsule; descending limb of the loop of Henle
B) the descending limb of the loop of Henle; ascending limb of the loop of Henle
C) the ascending limb of the loop of Henle; proximal tubule
D) the collecting duct; descending limb of the loop of Henle
E) the proximal tubule; ascending limb of the loop of Henle