Read the given statements and identify the structure referred here.
(i) Reabsorption in this region is minimum.
(ii) This region plays a significant role in the maintenance of high osmolarity of interstitial fluid.
(iii) Its descending limb is permeable to water but almost impermeable to electrolytes.
(iv) Its ascending limb is impermeable to water but allows transport of electrolytes actively or passively.
PCT
Loop of Henle
DCT
Bowman's capsule
As we learn
Henle’s Loop -
Reabsorption is minimum in its ascending limb.
- wherein
However, this region plays a significant role in the maintenance of high osmolarity of medullary interstitial fluid. The descending limb of loop of Henle is permeable to water but almost impermeable to electrolytes. This concentrates the filtrate as it moves down. The ascending limb is impermeable to water but allows transport of electrolytes actively or passively. Therefore, as the concentrated filtrate pass upward, it gets diluted due to the passage of electrolytes to the medullary fluid.
Correct option is 2