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प्रश्न
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
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उत्तर
During urine formation, the tubular cells secrete substances like H+, K+ and ammonia into the filtrate. Tubular secretion is also an important step in urine formation as it helps in the maintenance of the ionic and acid-base balance of body fluids.
- PCT helps to maintain the pH and ionic balance of the body fluids by selective secretion of hydrogen ions, ammonia and potassium ions into the filtrate
- DCT is also capable of selective secretion of hydrogen and potassium ions and NH3 to maintain the pH and sodium-potassium balance in the blood.
- The collecting duct also plays a role in the maintenance of pH and ionic balance of blood by the selective secretion of H+ and K+
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संबंधित प्रश्न
Fill in the blank :
The unit of human kidney is called .....................
Where in the urinary system do the following processes take place?
- Urine formation: ______.
- Transport of urine away from kidney: ______.
- Temporary storage of urine: ______.
Write down the functional activity of the following parts,
Urethra ……………………
Give the working of the nephron.
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.
Multiple Choice Question: Ultrafiltration occurs in:
When a molecule or ion is reabsorbed from the lumen of the nephron, where does it go? If a solute is filtered and not reabsorbed from the tubule, where does it go?
If Henle’s loop were absent from mammalian nephron, which one of the following is to be expected?
Identify the biological term
A liquid which gathers in the bladder.
Identfiy the biological term
Temporary storage of urine.
Identify the biological term
A ball of inter twined capillaries.
Identify the biological term
Regulation of water and dissolved substances in blood and tissue fluid.
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?
How is urea formed in the human body?
Name the substances other than water, that are reabsorbed during urine formation. What are the two parameters that decide the amount of water that is reabsorbed in the kidney?
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 ______.
Write full form of the following abbreviation:
DCT
