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

  • 1. 
    The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the ______.

  • Total lung capacity
  • Vital capacity
  • Tidal volume
  • Ventilation rate

  • 2. 
    Which one of the followings is correct regarding larynx?

  • It prevents foreign objects from entering the trachea
  • It houses the vocal cords
  • It is an organ made of cartilage and connects the pharynx to the trachea
  • All of these are correct

  • 3. 
    Which of the following statements is true about Trachea in a respiratory system?

  • It functions as passages of air to each alveolus
  • It functions for sound production
  • It Acts as passage of air to bronchi
  • It Lowers the surface tension

  • 4. 
    Which of the following statement is true?

  • Every 100 mL of deoxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
  • Every 100 mL of oxygenated blood delivers approximately 4 mL of oxygen to the tissues.
  • Every 100 mL of oxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
  • Every 100 mL of deoxygenated blood delivers approximately 10 mL of carbondioxide to the alveoli.

  • 5. 
    Trachea divides into bronchi at

  • 4th thoracic vertebra
  • 5th thoracic vertebra
  • 6th thoracic vertebra
  • 7th thoracic vertebra

  • 6. 
    Aerobic respiratory pathway is also termed as ______ pathway.

  • Anabolic
  • Catabolic
  • Creatine phosphate
  • Amphibolic

  • 7. 
    The oxygen dissociation curve is shifted to the right by an increase in ______.

  • H+ concentration
  • PCO
  • temperature
  • All of these

  • 8. 
    The maximum volume of air contained in the lung by a full forced inhalation is called

  • Vital capacity
  • Tidal volume
  • Total lung capacity
  • Inspiratory capacity

  • 9. 
    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.

  • 10. 
    Which organ lies in thoracic cavity?

  • Heart
  • Lungs
  • Pancreas
  • Both 1and 2
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