Quick Answer: What Is The Countercurrent Mechanism In The Kidney?

What is the purpose of countercurrent exchange?

The purpose of counter current exchange is to maintain a concentration gradient between the two fluids in order to maximize movement from one fluid to the other.

The opposite of counter current exchange occurs in concurrent exchange when two fluids flow in the same direction..

What is a function of the kidneys?

Why Are the Kidneys So Important? Most people know that a major function of the kidneys is to remove waste products and excess fluid from the body. These waste products and excess fluid are removed through the urine.

Do humans use countercurrent exchange?

Many animals (including humans) have another way to conserve heat. … Such a mechanism is called a countercurrent heat exchanger. When heat loss is no problem, most of the venous blood from the extremities returns through veins located near the surface.

What is the countercurrent mechanism?

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.

What is an example of countercurrent exchange?

Venous blood recovers heat from the arterial blood as the former warms on its way back to the body. Blood vessels in the neck also employ a countercurrent arrangement and that results in a brain temperature about 1°C cooler than that of the body. (A countercurrent exchange of blood oxygen occurs in the gills of fish.)

What is the difference between a countercurrent multiplier system?

Unlike the other countercurrent systems, a countercurrent multiplier system expends energy in active transport. … This expended energy distinguishes a countercurrent multiplier system from the other countercurrent systems.)

Where does the countercurrent mechanism occur?

The counter current mechanism takes place in Juxtamedullary nephron. The function of the countercurrent multiplier is to produce the hyperosmotic Medullary Interstitium. The ADH promotes water reabsorption through the walls of the distal convoluted tubule and collecting duct.

What is the countercurrent mechanism Why is it important quizlet?

-To conserve water, the countercurrent mechanism generates urine with osmolality greater than plasma. This concentrated urine is produced when ADH is present in the plasma (normal physiological condition). -To excrete water, the countercurrent mechanism generates urine with osmolality less than plasma.

What is the countercurrent mechanism in the nephron?

The counter-current multiplier or the countercurrent mechanism is used to concentrate urine in the kidneys by the nephrons of the human excretory system. The nephrons involved in the formation of concentrated urine extend all the way from the cortex of the kidney to the medulla and are accompanied by vasa recta.

Where is the countercurrent multiplier located?

Although both cortical and juxtamedullary nephrons regulate the concentrations of solutes and water in the blood, countercurrent multiplication in the loops of Henle of juxtamedullary nephrons is largely responsible for developing the osmotic gradients that are needed to concentrate urine.

How would the kidneys respond to hypoventilation?

When hypoventilation occurs at the lungs, the kidneys compensate by reducing glutamine metabolism. A. increased metabolism of glutamine by renal tubular cells increases the plasma bicarbonate concentration.

What are the advantages of countercurrent flow?

In contrast, countercurrent oxygen exchange allows the blood to pick up 90 percent of the oxygen in the water. This impressive ability to acquire oxygen allows fish to thrive in water that has oxygen levels only a tenth of those at the top of Mount Everest, where most people cannot survive without supplemental oxygen.

Do humans use countercurrent gas exchange?

Countercurrent exchange uses Diffusion to passively (no energy required) transfer the oxygen across to the blood. … Fish have lower metabolic rates than humans, and so their oxygen requirements are much lower than mammals and can live without hemoglobin.

What is a countercurrent exchange system?

a biological mechanism designed to enable maximum exchange between two fluids. The mechanism’s effect is dependent on the two fluids flowing in opposite directions, and having a concentration gradient between them.

What occurs in the countercurrent multiplier process?

Basically, what occurs in the countercurrent multiplier process? A higher sodium concentration is produced in the kidney medulla tissue that osmotically draws out water, reducing it within the tubules and the urine. … The increased solute concentration in the vasa recta would stimulate additional water reabsorption.