Homeostasis function of the kidney

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Homeostasis function of the kidney

What happens if you drink too much beer? Water gain Water loss Glossary Homeostasis is the maintenance of constant internal conditions.

My cells are bathed in a liquid tissue fluid which has constant conditions. We call this thermoregulation. The amount of glucose in my blood is constant; my body achieves this using hormones such as insulin, adrenalin and glucocorticoids; there is no special name for this mechanism, it is referred to as control or regulation of blood sugar level.

The amounts of water and various mineral salts is also held constant; this is osmoregulation. Osmoregulation is very important: The osmotic strength of our blood obviously depends upon how much glucose and mineral salts it contains as well as how much water is present; however if we just think about the water and assume that the amounts of sugar and salts are correct, we will be able to understand how the brain and kidneys osmoregulate.

Dehydration The hypothalamus detects changes in the amount of water present in the blood.

Homeostasis function of the kidney

If there is too little water the blood is too concentrated it tells the pituitary gland to secrete ADH. This hormone has an effect on the kidney; ADH makes the kidney re-absorb water from the ultra-filtrate. Higher levels of ADH make the kidney work harder to reabsorb more and more water.

This results in the production of very small quantities of very concentrated urine. The result of reabsorbing water is to reduce the concentration of the blood. By negative feedback the pituitary makes less ADH. Too little water in the blood, detected by the hypothalamus.

More ADH produced by the pituitary gland. More water reabsorbed by the kidneys, caused by ADH. Blood becomes less concentrated. Negative feedback; hypothalamus detects change in blood concentration. Pituitary produces less ADH. Blood returns to correct osmotic concentration.

Waterlogging The hypothalamus detects that there is too much water in the blood.

Urinary System Physiology

Animal cells are in danger of swelling and bursting if they are placed in a solution which is too dilute. It is very important that the blood does not become so dilute that our cells are stressed by waterlogging.

When the blood becomes too dilute, our pituitary glands stop making ADH. The kidney stops reabsorbing water. Large volumes of very dilute urine are formed.

So you just sit or stand there for a long time when you need to urinate!!! This is just the opposite of what happens when your blood is too concentrated.The kidney is a bean-shaped structure with a convex and a concave border. A recessed area on the concave border is the renal hilum, where the renal artery enters the kidney and the renal vein and ureter leave.

The kidney is surrounded by tough fibrous tissue, the renal capsule, which is itself surrounded by perirenal fat, renal fascia, and pararenal fat.

Urinary System Anatomy

Osmoregulation is the control of the levels of water and mineral salts in the blood. It is a homeostatic mechanism. There are three important homeostatic mechanisms: osmoregulation, thermoregulation and regulation of blood sugar levels.

Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Osmoregulation is the control of the levels of water and mineral salts in the blood.

It is a homeostatic mechanism. There are three important homeostatic mechanisms: osmoregulation, thermoregulation and regulation of blood sugar levels. Not only do plant-based diets appear to prevent kidney function decline, they may also be used to treat kidney failure.

Even at the same protein loads, the body is able to better handle phosphorus excretion from plant-based diets, reducing the .

Homeostasis function of the kidney

Note: DCT = distal convoluted tubule; PCT = proximal convoluted tubule Kidney function. The primary function of the kidneys is to help maintain homeostasis by regulating the composition (including pH) and the volume of the extracellular fluid.

Kidney - Wikipedia