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Regarding Henle’s Loop - choose the correct one:


( A ) no role in the maintenance of osmolarity of medullary interstitial fluid
( B ) Reabsorption in Henle's loop is maximum
( C ) The ascending limb is impermeable to water but allows transport of electrolytes actively or passively.
( D ) The descending limb of loop of Henle is permeable to electrolytes but almost impermeable to water.
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1 Answer

(C) is the right answer.

Henle’s Loop: Reabsorption in this segment is minimum. 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.
answered Apr 3, 2014 by pady_1
 

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