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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
Glucose is taken back from glomerular filtrate ___________
(A) along with concentration gradient
(B) against concentration gradient
(C) by simple diffusion
(D) by tubular secretion
Add a noteon composition of urine.
Which of the following is the correct path taken by urine in our body?
Differentiate between
bowman’s capsule and glomerulus.
Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?
If the afferent arteriole of the nephron constricts, what happens to the GFR in that nephron? If the efferent arteriole constricts what happens to the GFR in that nephron? Assume that no auto regulation takes place.
If Henle’s loop were absent from mammalian nephron, which one of the following is to be expected?
The end product of Ornithine cycle is ______.
Identfiy the biological term
Temporary storage of urine.
Identify the biological term
Consists of the kidneys, ureters and bladder.
Identify the biological term
Removal of useful substances from 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?
The human kidney is histologically divided into ____________.
First step in urine formation is ______.
The following substances are the excretory products in animals. Choose the least toxic form among them?
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 –
Name the following:
Three stages of urine formation.
