Breathing and Exchange of Gases

Breathing and Exchange of Gases

Moderate Questions
Difficult Questions

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. Listed below are four respiratory capacities (i–iv) and four jumbled respiratory volumes of a normal human adult:
    Respiratory Respiratory      capacities volumes
    (i) Residual volume      2500mL
    (ii) Vital capacity      3500mL
    (iii) Inspiratory reserve      1200mL volume
    (iv) Inspiratory capacity      4500mL
    Which one of the following is the correct matching of two capacities and volumes?








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    The correct matching of respiratory capacities with their respiratory volumes are:

    Correct Option: C

    The correct matching of respiratory capacities with their respiratory volumes are:

  1. The alveolar epithelium in the lungs is








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    The very thin alveolar wall (about 0.0001 mm) is composed of moist, non– ciliated, squamous epithelial cells

    Correct Option: B

    The very thin alveolar wall (about 0.0001 mm) is composed of moist, non– ciliated, squamous epithelial cells

  1. Skin is an accessory organ of respiration in








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    Frog has lungs as its main respiratory organs but during hibernation & aestivation and when in water it respires through skin.

    Correct Option: B

    Frog has lungs as its main respiratory organs but during hibernation & aestivation and when in water it respires through skin.

  1. Air is breathed through








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    The pathway of inhaled air is - Nostrils → pharynx (common passage for food & air) → larynx (voice box) → trachea (the wind pipe) → bronchi (2 for each side lungs) → bronchioles (give rise to alveolar ducts) → alveoli (the exchange site for gases in the form of small sacs or pouches).

    Correct Option: C

    The pathway of inhaled air is - Nostrils → pharynx (common passage for food & air) → larynx (voice box) → trachea (the wind pipe) → bronchi (2 for each side lungs) → bronchioles (give rise to alveolar ducts) → alveoli (the exchange site for gases in the form of small sacs or pouches).

  1. The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and/or characteristics.









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    Alveoli are very thin, irregular walled bag like structures for gaseous exchange. Tracheae bronchi and bronchioles are supported by incomplete cartilaginous rings. Double layered pleural membrane surrounds the lungs with pleural fluid between them. It reduces friction on the lung surface.

    Correct Option: B

    Alveoli are very thin, irregular walled bag like structures for gaseous exchange. Tracheae bronchi and bronchioles are supported by incomplete cartilaginous rings. Double layered pleural membrane surrounds the lungs with pleural fluid between them. It reduces friction on the lung surface.