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प्रश्न
What is meant by the term osmoregulation?
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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
Where in the urinary system do the following processes take place?
- Urine formation: ______.
- Transport of urine away from kidney: ______.
- Temporary storage of urine: ______.
Differentiate between
bowman’s capsule and glomerulus.
Explain the terms ultrafiltration and selective absorption
Multiple Choice Question: Ultrafiltration occurs in:
Multiple Choice Question: In the Bowman’s capsule:
Higher Order Thinking Skill
Why do you think that urine analysis is an important part of medical diagnosis?
What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?
What solute is normally present in the body to estimate GFR in humans?
Concentration of urine depends upon which part of the nephron
The end product of Ornithine cycle is ______.
Identify the biological term
Regulation of water and dissolved substances in blood and tissue fluid.
Identify the biological term
What solute the blood contains that are not present in the glomerular filtrate?
With regards to toxicity and the need for dilution in water, how different are ureotelic and uricotelic excretions? Give examples of animals that use these types of excretion?
What is tubular secretion? Name the substances secreted through the renal tubules.
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
A large quantity of fluid is filtered every day by the nephrons in the kidneys. Only about 1% of it is excreted as urine. The remaining 99% of the filtrate ______.
