Advertisements
Advertisements
Question
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
Advertisements
Solution
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+
APPEARS IN
RELATED QUESTIONS
What is meant by the term osmoregulation?
Dialysis fluid contains all the constituents as in plasma except ______.
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Filtration of excretory wastes from the blood occurs in:
State if the following statement is true or false. Correct the statement if it is false.
The Bowman’s capsule and glomerulus together form the Malpighian body.
Fill in the blank.
When air is humid, the rate of transpiration is ..................
Give the working of the nephron.
Multiple Choice Question: Ultrafiltration occurs in:
Choose the correct option.
Tubular secretion does not take place in ______.
What is micturition?
What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?
In which segment of the nephron most of the re-absorption of substances takes place?
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.
Concentration of urine depends upon which part of the nephron
Aldosterone acts at the distal convoluted tubule and collecting duct resulting in the absorption of water through ______.
Identify the biological term
Consists of the kidneys, ureters and bladder.
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?
Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
First step in urine formation is ______.
The composition of glomerular filtrate and urine is not same. Comment.
