Question

Reabsorption of water in PCT part of nephron is

• A. Passive, 80%
• B. Active, 40%
• C. Active, 80%
• D. Passive, 40%

Answer 1

Answer: (A)

Passive, 80%

PCT is lined by simple cuboidal brush border epithelium which increases the surface area for reabsorption. Nearly all of the essential nutrients and 70-80 % of water and electrolytes are reabsorbed by this segment. The reabsorption of water in PCT is passive process i.e energy is not required.

So, the correct answer is 'Passive 80%'.