Question

give the brief account of the counter current mechanism

Answer 1

A countercurrent mechanism system is a mechanism that expends energy to create a concentration gradient. ... For example, it can refer to the process that is underlying the process of urine concentration, that is, the production of hyperosmotic urine by the mammalian kidney.

Or

The counter current mechanism operating inside the kidney is the main adaptation for the conservation of water. There are two counter current mechanisms inside the kidneys. They are Henle's loop and vasa rectae.


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Answer 2

The counter-current mechanism

Explanation:

• The counter-current mechanism working inside the kidney is the main adaptation to conserve water. There are two reversible mechanisms inside the kidney. They are the Henle loop and the vasa recta.

• The Henle loop is the U-shaped part of the nephron. Blood flows in opposite directions in both the parts of the tube and this produces opposite currents.

• The vasa recta is an efferent arteriole that forms a capillary network around the tubules inside the renal medulla.

• It runs parallel to the loop of Henle and is U-shaped. Blood flows in opposite directions in the two organs of the vasa recta.

• As a result, the blood entering the renal medulla in the descending limb comes into close contact with the outgoing blood in the ascending limb.