Question

Write a short notes on counter current hypothesis

Answer 1

Counter current hypothesis is a mechanism that expends energy to create a concentration gradient.

It is found widely in nature and especially in mammalian organs. 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 mammaliankidney. The ability to concentrate urine is also present in birds.

Countercurrent multiplication is frequently mistook for countercurrent exchange, a similar but different mechanism where gradients are maintained, but not established .