Explain osmoregulatory role of kidneys?
Answers
osmoregulatory role of kidney
1. To maintain the water and salt balance in the body.
2. Control of osmosis.
This two's called as osmoregulation.
3. Excess of water in the body fluids lowers the osmotic pressure of the blood and increases the blood volume.
The kidney while removing wastes like urea from the blood also regulates it's composition i.e. the percentage of water and salts. This function is called osmoregulation- it implies the regulation of osmotic pressure of the blood.
Drinking enough water directly or through food helps the kidneys in their proper working. In tropical climates, as in our country, we drink a lot of water during the summer. Yet we urinate fewer times in summer than in winter and the urine passed is generally thicker. The reason is that in summer, we lose a considerable part of water through perspiration and the kidneys have to reabsorb more water from the urine making it more concentrated.
In cholera, the patient suffers from vomiting and watery bowels. His intestines are unable to absorb water into the blood. The result is that his kidneys reabsorb almost all the water from the urine in the renal tubules and with it even the urea. Ultimately the patient may die due to poisoning by the accumulation of high quantities of urea in his body ( uremia). The immediate treatment is to replenish water in the blood by glucose-saline drip or by giving oral rehydration solution (ORS) through the mouth.