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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
What is meant by the term osmoregulation?
Reabsorption of water from distal parts of the tubules is facilitated by hormone ______.
Glucose is taken back from glomerular filtrate ___________
(A) along with concentration gradient
(B) against concentration gradient
(C) by simple diffusion
(D) by tubular secretion
Which of the following is the correct path taken by urine in our body?
Define the following:
Nephron
Fill in the blank.
When air is humid, the rate of transpiration is ..................
Differentiate between
bowman’s capsule and glomerulus.
Differentiate between Afferent arteriole and Efferent arteriole.
Write the functional activity of the following structure: Bowman’s capsule
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?
Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?
The end product of Ornithine cycle is ______.
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.
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?
Na+ excretion in the urine is reduced by secretion of ______
Complete the following:
Urinary excretion = Tubular reabsorption + Tubular secretion –
The composition of glomerular filtrate and urine is not same. Comment.
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 ______.
