Question

Which of the following is totally reabsorbed in renal tubules?

• A. Na
• B. K
• C. $H_{2}0$
• D. $C_6{H}_{12}{O}_6$

Answer 1

Answer: (D)

$C_6{H}_{12}{O}_6$

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 percent of electrolytes and water are reabsorbed by this segment. Most of the (glucose) is actively reabsorbed in the proximal convolutes tubule (PCT) part of the nephron.

So, the correct answer is 'C${}_6$H${}_{12}$O${}_6$'.