Active pumping out of Na+ occurs at which part of nephron:
Correct answer: C. Ascending loop of Henle
- A. Proximal tubule
- B. Descending loop of Henle
- C. Ascending loop of Henle
- D. Collecting ducts
Explanation
Option C is correct.Primary site of reabsorption of sodium ions in the nephron is the ascending loop of Henle. The ascending loop of Henle is responsible for the active reabsorption of sodium and other solutes. Sodium is actively pumped out of the tubule cells into the interstitial fluid, creating a concentration gradient that allows for the reabsorption of other solutes in the distal parts of the nephron.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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