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51.

Write notes on the following :

Hypoxia, pneumonia, emphysema and cough.

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52. Explain the respiratory tract of man.

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53. Explain why the following happen :

(a) Far more oxygen is released from oxyhaemoglobin in a more active tissue than in a less active one.

(b) Oxygenation of blood promotes the release of carbondioxide from blood in the lungs.

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54. Discuss the functions of respiratory tract.

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55. Write a note on pleura.

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56. Write brief notes on pharyngitis, laryngitis, bronchitis, asthma.

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57. What is partial pressure ? How does it help in gaseous exchange during respiration ?

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58. How does haemoglobin help in transport of oxygen from lung to tissue ?

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59. What is the role of carbonic anhydrase in the transport of gases during respiration ?

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60. Discuss the necessary features of a gas exchange surface.

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