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Nacl is transported by the ascending limb of Henle’s loop which is exchanged with-
- a)DCT
- b)PCT
- c)Ascending limb of vasa recta
- d)Descending limb of vasa recta
Correct answer is option 'D'. Can you explain this answer?
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Nacl is transported by the ascending limb of Henle’s loop which ...
That is incorrect. Sodium chloride (NaCl) is reabsorbed by the thick ascending limb of the loop of Henle, not transported by it. The ascending limb of the loop of Henle is impermeable to water but actively transports sodium and chloride ions out of the filtrate and into the surrounding interstitial fluid. This creates a concentration gradient that allows for the reabsorption of water in the collecting duct.
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Nacl is transported by the ascending limb of Henle’s loop which ...
The vasa recta capillaries are long, hairpin-shaped blood vessels that run parallel to the loops of Henle. The hairpin turns slow the rate of blood flow, which helps maintain the osmotic gradient required for water reabsorption. The Henle’s loop and vasa recta play a significant role in this.
The flow of filtrate in the two limbs of Henle’s loop is in opposite directions and thus forms a counter current.
The flow of blood through the two limbs of vasa recta is also in a countercurrent pattern.
The proximity between the Henle’s loop and vasa recta, as well as the countercurrent in them, help in maintaining an increasing osmolarity towards the inner medullary interstitium, i.e., from 300 mOsmolL–1 in the cortex to about 1200 mOsmolL–1 in the inner medulla. This gradient is mainly caused by NaCl and urea.
NaCl is transported by the ascending limb of Henle’s loop which is exchanged with the descending limb of vasa recta.
NaCl is returned to the interstitium by the ascending portion of vasa recta. Similarly, small amounts of urea enter the thin segment of the ascending limb of Henle’s loop which is transported back to the interstitium by the collecting tubule.
The above-described transport of substances facilitated by the special arrangement of Henle’s loop and vasa recta is called the countercurrent mechanism. This mechanism helps to maintain a concentration gradient.
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Nacl is transported by the ascending limb of Henle’s loop which is exchanged with- a)DCTb)PCTc)Ascending limb of vasa rectad)Descending limb of vasa rectaCorrect answer is option 'D'. Can you explain this answer?
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