Take a huge breath while sitting up straight in your chair, and then do this again while slumped over. Compare the air volume entering the lungs in each situation. Why is there a difference?

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    The rib cage stays locked in an upward and outward orientation.
    There is less air moved into the lungs when you are slumped because the tissues need less oxygen for cellular respiration.
    The chest and rib cage cannot be increased in size effectively when you are slumped over in a chair.
    You cannot contract your chest muscles when slumped in a chair.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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The chest and rib cage cannot be increased in size effectively when you are slumped over in a chair.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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