Give a brief account of the countercurrent mechanism.

Asked by Pragya Singh | 2 years ago |  164

1 Answer

Solution :-

The Henle's loop and vasa recta help in the concentration of filtrate through counter current mechanism because the limbs of Henle's loop carry filtrate and the limb of vasa recta carry blood in opposite directions.

● The counter-current between the Vasa recta and Henle loops helps in maintaining the osmolarity from 300 mOsmol per liter in the cortex to 1200 mOsmol per liter in the inner medulla.

● The NaCl in the ascending loop of Henle's gets exchanged with the descending loop of the vasa recta and then after getting returned into the interstitium by the vasa recta through its ascending portion.

● The transportation of urea takes place through collecting tubules to the interstitium.

● The production of urine takes place four times more concentrated than initial filtrate in humans.

Excretory Products and their Elimination | Biology Notes for  NEET/AIIMS/JIPMER

Answered by Abhisek | 2 years ago

Related Questions

Fill in the gaps:

(a) Ascending limb of Henle’s loop is ______ to water whereas the descending limb is _______ to it.

(b) Reabsorption of water from distal parts of the tubules is facilitated by hormone _______.

(c) Dialysis fluid contain all the constituents as in plasma except _______.

(d) A healthy adult human excretes (on an average) _______ gm of urea/day

Class 11 Biology Excretory Products and their Elimination View Answer

Name the following:

1. A chordate animal having flame cells as excretory structures.

2. Cortical portions projecting between the medullary pyramids in the human kidney.

3. A loop of capillary running parallel to Henle’s loop.

Class 11 Biology Excretory Products and their Elimination View Answer