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प्रश्न
Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?
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उत्तर
- Distal tubule
- Collecting duct
- In the renal tubules H+ and NH4 are secreted and liberated into the tubules and excreted through
urine thus maintaining acid-base balance. - For each H+ ions from the liberated filtrate one Na+ is reabsorbed in the tubules.
- The secreted HCO3, PO3 and NH3 combines to form carbonic acid and phosphoric acids.
- Thus the H+ are maintained and their reabsorption is prevented.
संबंधित प्रश्न
Explain the autoregulatory mechanism of GFR.
Which of the following is the correct path taken by urine in our body?
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
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.
Where in the urinary system do the following processes take place?
- Urine formation: ______.
- Transport of urine away from kidney: ______.
- Temporary storage of urine: ______.
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?
Multiple Choice Question: Ultrafiltration occurs in:
The end product of Ornithine cycle is ______.
Identify the biological term
Produced when blood is filtered in a Bowman’s capsule.
Identify the biological term
Carry urine from the kidneys to the bladder.
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?
What is the nitrogenous waste produced by amphibian larvae and by the adult animal?
Na+ excretion in the urine is reduced by secretion of ______
The pH of human urine is approximately ______.
What are the main processes of urine formation?
Sort the following into actively or passively transported substances during reabsorption of GFR.
glucose, amino acids, nitrogenous wastes, Na+, water
Complete the following:
Urinary excretion = Tubular reabsorption + Tubular secretion –
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 ______.
Name the following:
Three stages of urine formation.
