The counter-current mechanism operates in:

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(A) The counter-current mechanism is a process that helps in concentrating the urine. It primarily operates through the interaction between the $Henle

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Vasa recta and Henle's loop

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(A) The counter-current mechanism is a process that helps in concentrating the urine. It primarily operates through the interaction between the $Henle's$ loop of juxtamedullary nephrons and the $vasa$ $recta$. The flow of filtrate in the two limbs of $Henle's$ loop is in opposite directions,and the flow of blood in the two limbs of the $vasa$ $recta$ is also in opposite directions. This arrangement facilitates the maintenance of an increasing osmolarity towards the inner medullary interstitium,which is essential for water reabsorption.

Similar Questions

$A :$ In the descending limb of the loop of Henle,the urine is hypertonic,while in the ascending limb of the loop of Henle,the urine is hypotonic.
$R :$ The descending limb is impermeable to $Na^+$,while the ascending limb is impermeable to $H_2O$.

Vasa recta refers to . . . . . . .

The longest loop of Henle is found in

Explain the mechanism of concentration of the filtrate.

To maintain the required osmotic concentration in the medullary interstitium of the kidneys of ureotelic animals,some amount of ..... is retained.

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