Human excretory system and nephron
Why this is asked: Not all nephrons are equal: about 85% are cortical nephrons with short loops of Henle, but the remaining 15%, the juxtamedullary ones, have loops that dive deep into the medulla — and it is specifically those long loops that build the gradient letting humans excrete hypertonic urine, a proportion-and-function pairing NEET tests together.
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Which of the following diagrams (shown) is correct with regard to the proximal (P) and distal (D) tubule of the nephron?
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Given below are two statements:
Statement I: In the nephron, the descending limb of the loop of Henle is impermeable to water and permeable to electrolytes.
Statement II: The proximal convoluted tubule is lined by simple columnar brush-border epithelium and increases the surface area for reabsorption.
In the light of the above statements, choose the correct answer from the options given below:
- •Choose the correct statement regarding the juxtamedullary nephron:
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