Zoology Excretory Products and their Elimination questions from NEET UG 2020.
Select the correct statement:
The increase in osmolarity from outer to inner medullary interstitium is maintained due to : (i) Close proximity between Henle's loop and vasa recta (ii) Counter current mechanism (iii) Selective secretion of ${\mathrm{HCO}}_{3}$$-$ and hydrogen ions in $\mathrm{PCT}$ (iv) Higher blood pressure in glomerular capillaries