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Which one of the following statements in regard to the excretion by the human kidneys is correct?

Option: 1

Descending limb of loop of Henle is impermeable to water


Option: 2

Distal convoluted tuble is incapable of reabsorbing HCO_{3}


Option: 3

Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules


Option: 4

Ascending limb of Loop of Henle is impermeable to electrolytes


Answers (1)

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The amount of urine released daily is 1.5 liters. The volume of filtrate formed per day is around 180 liters. Comparing both volumes it can be concluded that 99 percent of the filtrate is absorbed. Descending limb is impermeable to electrolytes. Ascending limb is impermeable to water. DCT tube absorbs bicarbonates.  

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Ajit Kumar Dubey

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