1. Tardigrade
  2. Question
  3. Biology
  4. Read the given statements and select the correct option Statement 1: The final reabsorption of water from the urine into the blood occurs through the collecting duct of a mammalian nephron resulting in the production of hyperosmotic urine Statement 2: The loop of Henle creates a sodium gradient in the interstitial fluid

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Q. Read the given statements and select the correct option
Statement 1 : The final reabsorption of water from the urine into the blood occurs through the collecting duct of a mammalian nephron resulting in the production of hyperosmotic urine
Statement 2 : The loop of Henle creates a sodium gradient in the interstitial fluid

Excretory Products and their Elimination

Solution:

The counter current mechanism in loop of Henle and vasa recta, helps in maintaining an increasing osmolarity of the interstitial fluid i.e., from $300\, mOs\,mol\,L^{-1}$ in the cortex to about $1200 \,mOs\,mol\,L^{-1}$ in the inner medulla. This gradient is mainly caused by $NaCI$ and urea. This gradient thus helps in easy reabsorption of water from the filtrate in the collecting duct so as to produce hyperosmotic urine