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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
Add a noteon composition of urine.
Write True (T) or False (F) for the following statement. Rewrite the false statement in the correct form.
Medulla of kidney passes urine into urinary bladder.
Fill in the blank.
When air is humid, the rate of transpiration is ..................
Write down the functional activity of the following parts,
Urethra ……………………
Define the following term:
Ultrafiltration
Give Reasons for the following:
As a result of ultrafiltration along with excretory products certain useful products like glucose, salt, etc. are also filtered but these are not excreted?
Differentiate between Afferent arteriole and Efferent arteriole.
Choose the correct option.
Tubular secretion does not take place in ______.
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?
What is micturition?
Identfiy the biological term
Temporary storage of urine.
Identify the biological term
Each contains a glomerulus.
What is the nitrogenous waste produced by amphibian larvae and by the adult animal?
The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
The correct path of transport of urine is ______
Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
Minimum reabsorption occurs in ______.
What are the main processes of urine formation?
