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  4. The gradient of medullary interstitium is mainly caused by

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Q. The gradient of medullary interstitium is mainly caused by

NTA AbhyasNTA Abhyas 2020Excretory Products and their Elimination

Solution:

One of the main functions of the kidneys is to keep the solute load of body fluids constant by regulating urine concentration and volume. The kidneys accomplish this task using countercurrent mechanisms. They depend on active transportation of solutes out of the ascending limb of the loop of Henle.