What is the site of gaseous exchange in an insect ? from Biolog
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    Breathing and Exchange of Gases

    Multiple Choice QuestionsShort Answer Type

    71. Define vital capacity. What is its significance?
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    72.

    State the volume of air remaining in lungs after a normal breathing.

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    73. What is the site of gaseous exchange in an insect ?

    In insects there is direct respiration. The fresh air reaches to all cells of body via trachea. The air enters into body through spiracles, trachea, branches of trachea and tracheoles. The tips of tracheoles have tissue fluid. The O2 of air from tip of tracheoles diffuses into cells and CO2 from tips of tracheoles diffuse outside. Thus, site for exchange of gases are tips of tracheoles in insects.
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    74. What happens to respiratory process in man going up a hill ?
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    75.

    Distinguish between

    (a) IRV and ERV.

    (b)Inspiratory and expiratory capacity.

    (c) Vital capacity and Total lung capacity. 

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    76.  What are occupational respiratory Disorders.
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    77.

    What are the major transport mechanisms for CO2
    ? Explain.

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    78.

    What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.

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    79.

    Explain the process of inspiration under normal conditions.

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    80.

    What is the effect of pCO2 on oxygen transport?

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