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    Nicolas Sanchez
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    The diagram shows a simple piece of apparatus that can be used to demonstrate some of the events involved in human ventilation.

    [see diagram below]

    Which events occurring during ventilation will be demonstrated by pulling the rubber diaphragm downwards, as shown by the arrow?

    1 diaphragm relaxes
    2 diaphragm contracts
    3 volume of thorax increases
    4 volume of thorax decreases
    5 pressure in thorax increases
    6 pressure in thorax decreases
    A. 1, 3, 5
    B. 1, 3, 6
    C. 1, 4, 5
    D. 1, 4, 6
    E. 2, 3, 5
    F. 2, 3, 6
    G. 2, 4, 5
    H. 2, 4, 6

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  • BMAT 2018 Section 2 Q17

  • Paris

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    July 21, 2021 at 9:46 am
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    By pulling the rubber diaphragm downwards, we would demonstrate the contraction of the diaphragm which creates negative pressure inside the thorax by increasing the volume while pushing the abdominal content downwards. So, 2,3 and 6 are correct.

    The answer is F.