CBSE  /  Class 11  /  Biology  /  Breathing and Exchange of Gases

  • 1. 
    The function of pneumotaxic centre is

  • regulate inspiration
  • regulate rhythm
  • increase heart rate
  • all of the above

  • 2. 
    Which one of the following is NOT correct?

  • The nasal cavity warms and humidifies the air before it enters the lungs
  • The right lung is composed of three lobes, but the left lung has only two lobes
  • Lung volumes and vital capacity measure lung function.
  • The visceral pleura is in direct contact with the chest wall.

  • 3. 
    ______ lies in front of esophagus.

  • Trachea
  • Glottis
  • Larynx
  • Epiglottis

  • 4. 
    In brain, respiratory control centre lies in

  • pons
  • medulla oblongata
  • hypothalamus
  • cerebrum

  • 5. 
    Deoxygenated blood from heart comes to lungs via

  • pulmonary vein
  • systemic vein
  • pulmonary artery
  • systemic artery

  • 6. 
    Label the parts of the human respiratory system.

  • A- Oesophagus, B- Bronchioles, C- Lungs
  • A- Trachea, B- Bronchioles, C- Lungs
  • A- Trachea, B- Bronchus, C- Lungs
  • A- Oesophagus, B- Bronchioles, C- Pleura

  • 7. 
    Pleura is a layer covering

  • heart
  • kidneys
  • lungs
  • brain

  • 8. 
    Rheumatic fever can cause damage

  • Alveoli of the Lungs
  • heart valves
  • heart muscles
  • pleural membranes function

  • 9. 
    What protects the moist membranes of the respiratory tract?

  • Mucus and cilia
  • A c shaped cartilage rings
  • A pebbly epidermal surface
  • An acidic glands

  • 10. 
    RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by

  • RBCs
  • Plasma
  • Bicarbonates
  • All RBCs and bicarbonate carried 70 per cent of carbondixide.
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