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Question

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

A
Distal convoluted tubule is incapable reabsorbing HCO3
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B
Nearly 99% of glomerular filtrate is reabsorbed by renal tubules
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C
Ascending limb of loop of Henle in impermeable to electrolytes
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D
Descending limb of loop of Henle, impermeable to water
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Solution

The correct option is C Nearly 99% of glomerular filtrate is reabsorbed by renal tubules
About 180 litres (100%) of fluid is filtered out of blood every day by nephrons but an adult human excretes, on an average, 1 to 1.5 litres (1 %) of urine per day. The remaining 99% of glomerular filtrate is absorbed into the blood by renal tubules to maintain constant homeostasis in the body. Hence nearly 99% of glomerular filtrate is reabsorbed by renal tubules.
S0, the correct answer is 'Option B'.

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