Chapter 209 of 2363 min read
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.
This chapter is part of a paid pack
A sample of the book is free to read — the rest, including this chapter, unlocks with full access.
See pricingTest yourself
- •Which of the following diagrams (shown) is correct with regard to the proximal (P) and distal (D) tubule of the nephron?
- •Choose the correct statement regarding the juxtamedullary nephron:
- •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:
Open this in the full syllabus view · Zoology