Sodium ions are actively transported through?
- Thin loop of Henle
- Thick loop of Henle
- Proximal tubule
- Collecting duct
Explanation
- The nephron is the functional unit of the kidney.
- Sodium reabsorption occurs at different parts of the nephron.
- Thick loop of Henle actively pumps out Na⁺ using ATP (active transport).
- Thin loop of Henle mainly allows passive movement of water and ions.
- Proximal tubule reabsorbs Na⁺ mainly by secondary active transport; collecting duct fine-tunes Na⁺ under hormonal control (aldosterone).
Last updated question 17-02-2026
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