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9 July, 01:23

When the diaphragm contracts, air pressure in the chest increases. True or False?

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  1. 9 July, 01:32
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    False, it decreases to allow air to flow
  2. 9 July, 01:35
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    Answer: False

    When the diaphragm contracts, the muscles will also contract and pull upward and increase the size of the thoracic cavity thus decreases air pressure inside during inspiration. After the diaphragm contracts, it goes to relaxation, the muscles will also relaxed. It gets looser and return to its original position higher up in the chest. This increase the pressure in the chest, which force the air in the lungs out through the nose.
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