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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
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.
One of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir.
ADH, Water, pituitary, osmoregulation, urine
Write down the functional activity of the following parts,
Urethra ……………………
Define the following term:
Ultrafiltration
Explain the terms ultrafiltration and selective absorption
Write the functional activity of the following structure: Bowman’s capsule
Higher Order Thinking Skill
Why do you think that urine analysis is an important part of medical diagnosis?
In which segment of the nephron most of the re-absorption of substances takes place?
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 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.
Identify the biological term
Produced when blood is filtered in a Bowman’s capsule.
Identify the biological term
Each contains a glomerulus.
Identify the biological term
Regulation of water and dissolved substances in blood and tissue fluid.
What is tubular secretion? Name the substances secreted through the renal tubules.
Na+ excretion in the urine is reduced by secretion of ______
The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
The following substances are the excretory products in animals. Choose the least toxic form among them?
What are the main processes of urine formation?
Name the following:
Three stages of urine formation.
Write full form of the following abbreviation:
DCT
