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Breathing and Exchange of Gases

Short Answer Type

61. How does respiration fulfil the energy requirement of an organism ?

During respiration food is oxidized and CO₂ , H₂O and energy are produced. The energy produced is stored in ATP molecules in mitochondria. Whenever energy is required it is released by ATP molecules.

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + 684 K Cal

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Long Answer Type

62. Explain the different types of pulmonary volumes.

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63. Describe the mechanism of exchange of gases.

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64.

What is the role of diaphragm and inter costal muscles in breathing ?

Describe the mechanism of breathing.

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65. Discuss the transportation of oxygen.

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Short Answer Type

66. Differentiate between (a) Right and Left lung (b) Tracheoles and Bronchioles

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Long Answer Type

67. Comment upon the transportation of carbon-dioxide.

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Short Answer Type

68. Diffusion of gases occur in the alveolar region only and not in the other part of respiratory system, why ?

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Long Answer Type

69.

Differentiate between :

(a) Anaerobic and aerobic respiration

(b) Combustion and respiration

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Multiple Choice Questions

70. What will be the pO₂ and pCO₂ in the atmospheric air compared to those in the alveolar air ?

(i) pO₂ lesser, pCO₂ higher
(ii) pO₂ higher, pCO₂ higher
(iii) pO₂ higher, pCO₂ higher
(iv) pO₂lesser, pCO₂ lesser.

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