The increase in osmolarity from outer to inne | vedclass

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Question

(A) The correct answer is option $(A)$ because both statements $(i)$ and $(ii)$ are correct.The counter current mechanism is based on the close proxim

Vedclass · Accepted Answer

$(i)$ and $(ii)$

Vedclass · Answer

(A) The correct answer is option $(A)$ because both statements $(i)$ and $(ii)$ are correct.The counter current mechanism is based on the close proximity and the parallel arrangement of the Henle's loop and the vasa recta.This mechanism helps in maintaining a concentration gradient in the medullary interstitium,which is essential for the concentration of urine.Statement $(iii)$ is incorrect because the $PCT$ (Proximal Convoluted Tubule) is involved in the selective secretion of $H^{+}$,ammonia,and $K^{+}$ ions,and the reabsorption of $HCO_{3}^{-}$,but it does not contribute to the medullary osmotic gradient.Statement $(iv)$ is incorrect because the high blood pressure in the glomerular capillaries is responsible for the process of glomerular filtration,not for the counter current mechanism.

Similar Questions

In human kidneys,which substances are mainly responsible for creating the osmolarity gradient of the medullary interstitial fluid?

The flow of $P$ in the limbs of the Loop of Henle and the flow of $Q$ in the limbs of the vasa recta create a counter-current mechanism.
$\quad P \quad\quad Q$

Which of the following factors is responsible for the formation of concentrated urine?

If the kidneys fail to reabsorb water,what will be the effect on the tissues?

State the importance of the following:
$(1)$ Sebum
$(2)$ Counter current mechanism

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