Excretory Products and their Elimination

Excretory Products and their Elimination

Easy Questions
Moderate Questions
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Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. Bowman’s glands are found in








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    Bowman’s glands are found in olfactory epithelium which secrete mucus to keep the olfactory epithelium moist and free from germs.

    Correct Option: D

    Bowman’s glands are found in olfactory epithelium which secrete mucus to keep the olfactory epithelium moist and free from germs.

  1. The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is








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    (i) Glomerular capillary pressure (45 mm Hg) favours filteration.
    (ii) The colloidal osmotic pressure (due to plasma proteins, particularly albumin) acts against filteration. Its value is ~20 mmHg.
    (iii) The filterate pressure due to the glomerular filterate filled in the Bowman’s capsule also acts against filteration. Its value is ~10 mmHg.
    Net filteration pressure
    = 45 – (20 + 10) mm Hg
    = 15 mm of Hg (10 – 20 mm of Hg)

    Correct Option: C

    (i) Glomerular capillary pressure (45 mm Hg) favours filteration.
    (ii) The colloidal osmotic pressure (due to plasma proteins, particularly albumin) acts against filteration. Its value is ~20 mmHg.
    (iii) The filterate pressure due to the glomerular filterate filled in the Bowman’s capsule also acts against filteration. Its value is ~10 mmHg.
    Net filteration pressure
    = 45 – (20 + 10) mm Hg
    = 15 mm of Hg (10 – 20 mm of Hg)

  1. In Ornithine cycle, which of the following wastes are removed from the blood?








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    Urea NH2 – CO – NH2 is formed from two molecules of ammonia and one molecule of carbon dioxide. A molecule of ammonia combines with carbondioxide to form carbonyl phosphate. It reacts with ornithine to form citrulline. Citrulline accepts another molecule of NH4+ giving rise to arginine. Arginine is hydrolysed into urea and ornithine with the help of enzyme arginase.

    Correct Option: C

    Urea NH2 – CO – NH2 is formed from two molecules of ammonia and one molecule of carbon dioxide. A molecule of ammonia combines with carbondioxide to form carbonyl phosphate. It reacts with ornithine to form citrulline. Citrulline accepts another molecule of NH4+ giving rise to arginine. Arginine is hydrolysed into urea and ornithine with the help of enzyme arginase.

  1. If Henle's loop were absent from mammalian nephron, which of the following is to be expected?








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    Henle’s loop is associated with the concentration of urine and production of hypertonic urine.

    Correct Option: A

    Henle’s loop is associated with the concentration of urine and production of hypertonic urine.

  1. Formation of concentrated (hyperosmotic) urine in vertebrates generally depends on








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    Henle’s loop is involved in osmoregulation and concentrating urine. Thus producing a hypertonic urine.

    Correct Option: B

    Henle’s loop is involved in osmoregulation and concentrating urine. Thus producing a hypertonic urine.