Class 11 Biology - Chapter Excretory products and their Elimination NCERT Solutions | Define Glomerular Filtration Rate (GFR)
Define Glomerular Filtration Rate (GFR)
Glomerular filtration rate is the amount of glomerular filtrate formed in all the nephrons of both the kidneys per minute. In a healthy individual, it is about 125 mL/minute. Glomerular filtrate contains glucose, amino acids, sodium, potassium, urea, uric acid, ketone bodies, and large amounts of water.
More Questions From Class 11 Biology - Chapter Excretory products and their Elimination
- Q:-
Describe the role of liver, lungs and skin in excretion.
- Q:- Explain the autoregulatory mechanism of GFR.
- Q:- Give a brief account of the counter current mechanism.
- Q:- Name the following:
(a) A chordate animal having flame cells as excretory structures
(b) Cortical portions projecting between the medullary pyramids in the human kidney
(c) A loop of capillary running parallel to the Henles loop. - Q:- What is the significance of juxtaglomerular apparatus (JGA) in kidney function?
- Q:- Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why?
- Q:- Fill in the gaps:
(a) Ascending limb of Henles loop is ____________to water whereas the descending limb is___________to it.
(b) Reabsorption of water from distal parts of the tubules is facilitated by hormone____________.
(c) Dialysis fluid contains all the constituents as in plasma except ________.
(d) A healthy adult human excretes (on an average) _______ gm of urea/day. - Q:-
What is meant by the term osmoregulation?
- Q:- Match the items of column I with those of column II:
Column I Column II
(a) Ammonotelism (i) Birds
(b) Bowmans capsule (ii) Water reabsorption
(c) Micturition (iii) Bony fish
(d) Uricotelism (iv) Urinary bladder
(e) ADH (v) Renal tubule - Q:- Explain micturition.
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- Q:-
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell. - Q:- What are macromolecules? Give examples.
- Q:- What is the average cell cycle span for a mammalian cell?
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