Question

Reabsorption of useful substances back into blood from the filtrate m a nephron occurs

• A. proximal convoluted tubule
• B. distal convoluted tubule
• C. collecting duct
• D. loop of Henle

Answer 1

The correct option is A proximal convoluted tubule

(A) Proximal Convoluted Tubule (PCT) - Nearly all of the essential nutrients and 70-80% of electrolytes and water are reabsorbed by this segment. It is the main site for reabsorption of useful substance from Glomerular Filtrate.

(B) Distal Convoluted Tubule (DCT) - Conditional reabsorption of Na+ and water takes place in this segment.

(C) Collecting duct - Large amount of water could be reabsorbed from this region to produce concentrated urine.

(D) Loop of Henle - Reabsorption in this segment is minimum.

So the correct option is Proximal Convoluted Tubule.