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प्रश्न
What is meant by the term osmoregulation?
उत्तर
- Kidneys continuously remove harmful substances from the body in the form of urine. Apart from this, the tissues also control the amount of salt and water in the liquid.
- When the amount of water in the body increases, that is, when the osmolality of the body fluid decreases, urine becomes thin (diluted) and its quantity increases.
- When there is a lack of water in the body, that is, when the osmolality of body tissue fluid increases, urine becomes thicker and its quantity reduces.
- The amount of urine is mainly controlled by aldosterone and antidiuretics. Aldosterone increases the reabsorption of Na+, so that the appropriate amount of Na+ is maintained in the environment.
- Antidiuretic or vasopressin, is the main regulator of urine dilution or concentration. Osmolality is controlled in the bodies of living beings through the process of osmotic regulation.
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संबंधित प्रश्न
Explain the autoregulatory mechanism of GFR.
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As a result of ultrafiltration along with excretory products certain useful products like glucose, salt, etc. are also filtered but these are not excreted?
Answer the following question.
Effective filtration pressure was calculated to be 20 mmHg; where glomerular hydrostatic pressure was 70 mm of Hg. Which other pressure is affecting the filtration process? How much is it?
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Higher Order Thinking Skill
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Identify the biological term
A liquid which gathers in the bladder.
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Each contains a glomerulus.
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Sort the following into actively or passively transported substances during reabsorption of GFR.
glucose, amino acids, nitrogenous wastes, Na+, water
The composition of glomerular filtrate and urine is not same. Comment.
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
