Fill in the blanks:

a. Ascending limb of Henle’s loop ...(1)... to water whereas the descending limb is ...(ii)... to it.
b. Reabsorption of water from distal parts of the tubule is facilitated by hormone ...(iii)...
c. Dialysing fluid contain all the constituents as in t] plasma except ...(iv)..
d. A healthy adult human excrete (on an average) ...(v)... of urea/day.

Options

A.  a-ascending, b-descending, c-collecting tubule, d-thick, e-vasa recta
B. a-descending, b-ascending, c- collecting tubules, d-thin, e-vasa recta
C. a-ascending, b-descending, c-vasa recta, d-thick, e-collecting tubule
D. a-ascending, b-descending, c-vasa recta, d- thin, e-collecting tubule

Answer

D

Explanation

1. In counter current mechanism, NaCl is transported by the ascending limb of Henle’s loop Which is exchanged wim the descending limb of vasa recta
2. NaCl is returned to the interstitium by ascending portion of vasa recta.
3. Small amount of urea enter the thin segment of ascending limb of Henle’s loop which is transported back to the interstitium by the collecting tubule.