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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
Glucose is taken back from glomerular filtrate ___________
(A) along with concentration gradient
(B) against concentration gradient
(C) by simple diffusion
(D) by tubular secretion
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.
What is meant by osmoregulation?
Differentiate between
bowman’s capsule and glomerulus.
Explain the terms ultrafiltration and selective absorption
Name the following:
Organ where ultrafiltration occurs.
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?
Differentiate between Afferent arteriole and Efferent arteriole.
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.
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.
During ultra:filtration, ____________ is unable to filter through the glomerular capillaries.
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 ______.
How does tubular secretion help in maintaining ionic and acid-base balance in body fluids?
Write full form of the following abbreviation:
DCT
