Question

Where majority of the reabsorption takes place?

• A. Renal capsule
• B. Proximal convoluted tubule
• C. Collecting duct
• D. Ascending limbs of the loop of Henle

Answer 1

The correct option is B Proximal convoluted tubule

Proximal convoluted tubule (PCT) is lined by simple cuboidal brush border epithelium, which increases the surface area for reabsorption. About 70-80% of electrolytes and water are reabsorbed by this segment. Bicarbonate ions are reabsorbed with H+ ion secretion. Almost 100% of amino acids and glucose is also recovered by facilitated diffusion.

Thus, the correct answer is option B.