The part of the nephron that helps in the active reabsorption of sodium is the:
- ABowman's capsule
- BDistal convoluted tubule
- CAscending limb of Henle's loop
- DProximal convoluted tubule
Show answer and explanation
Correct answer: (d) Proximal convoluted tubule
Explanation
The proximal convoluted tubule (PCT) is the main site of reabsorption in the nephron. About two-thirds (65–70%) of the filtered sodium is reabsorbed here by active transport, driven by the sodium–potassium pump, and water follows by osmosis. Nearly all the glucose and amino acids are also taken back here.
The ascending limb of Henle's loop and the distal tubule also reabsorb sodium, but in smaller amounts. Bowman's capsule filters the blood; it does not reabsorb.