Self Studies

Breathing and E...

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  • Question 1
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    Which of the following pair of factors are considered favourable for the formation of oxyhaemoglobin? 

  • Question 2
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    Read the following statements :

    i. Pressure contributed by and individual gas in a mixture of gases is called its partial pressure
    ii. pCO2 in alveolar air is 45 mm Hg and in venous blood is 40 mm Hg.

  • Question 3
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    The principle of exchange of gases at the lungs is :

  • Question 4
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    Read the following statements :

    i. The affinity of Hb for CO is 200 to 250 times more than its affinity for oxygen therefore CO competes with oxygen for binding to Hb.
    ii. The result of this binding are a shift of oxygen-hemoglobin dissociation curve to the left and its alteration to a more hyperbolic shape.

  • Question 5
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    Expiration will take place when there is :

  • Question 6
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    RBCs and muscle cells carry out anaerobic respiration, but :

    i. RBCs are permanently anaerobic and muscle cells are temporarily anaerobic
    ii. RBCs are temporarily anaerobic and muscle cells are permanently anaerobic
    iii. Muscle cells lack mitochondria.

  • Question 7
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    Water breathing is more problematic than air breathing because :

    i. water is 800 times more dense and hence holds much more oxygen than air does.
    ii. since oxygen dissolved in water diffuses far more slowly than air therefore large quantity of water is required to be passed over the gills.

  • Question 8
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    Read the following about blood pigments :

    i. Hemoglobin is the pigment present in our blood and is iron containing protein.
    ii. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein.
    iii. Haemocyanin is much more efficient than haemoglobin.

  • Question 9
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    The exchange of gases in :

    i. the alveoli that lowers the pO2 of blood and raises its pCO2 is external respiration
    ii. the tissues that lowers the pCO2 of blood and raises its pO2 is internal respiration

  • Question 10
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    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 characteristic.

  • Question 11
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    Name the pulmonary disease in which the alveolar surface area involved in gas exchange is drastically reduced due to damage to the alveolar walls.

  • Question 12
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    Asthma may be attributed to:

  • Question 13
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    Match the items given in column I with those in  column II and select the correct options given below:

    Column I 

    Column II 
           
    a.Tidal volume 1 2500-3000 mL          
    b.Inspiratory Reserve volume 2 1100-1200 mL                        
    c.Expiratory Reserve volume 3 500-550 mL
    d.Residual volume 4 1000-1100 mL         

  • Question 14
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    It is much easier for a small animal to run uphill than for a large animal, because

  • Question 15
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    The partial pressure of oxygen in the alveoli of the lungs is

  • Question 16
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    Name the chronic respiratory disorder caused mainly by cigarette smoking.

  • Question 17
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    Bulk of carbon dioxide $$\left(C{O}_{2}\right)$$ released from body tissues into the blood is present as

  • Question 18
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    When you hold your breath which of the following gas changes in blood would first lead to the urge to breathe?

  • Question 19
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    Identify the wrong statement with reference to transport of oxygen.

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