NEETBiologyExcretory Products and Their EliminationMCQ+4 / −1
Which one of the following statements in regard to the excretion by the human kidneys is correct?
- ADescending limb of loop of Henle is impermeable to water.
- BDistal convoluted tubule is incapable of reabsorbing HCO3
- CNearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules.
- DAscending limb of loop of Henle is impermeable to electrolytes.
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Correct answer: C
Urine formation involves three main process called, glomerular filtration, reabsorption
and secretion. A comparison of the volume
of the filtrate formed per day (which is 180
litres per day) with that of urine released
(about 1.5 litres) suggest that nearly 99 percent
of the glomerular filtrate is resorbed by the
renal tubules. The descending limb of loop of
Henle is permeable to water but impermeable
to electrolytes.
The ascending limb is impermeable to
water but allows transport of electrolytes.
Reabsorption of sodium ions and water
takes place in distal convoluted tubule.
Also, it is capable of reabsorption of
HCO3.
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