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16 September, 11:46

Which occurs during inhalation? The diaphragm relaxes. The rib cage expands. Air is pushed out of the body. Lung volume decreases.

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  1. 16 September, 13:05
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    The correct answer is "The rib cage expands."

    The other three options occur when you are exhaling, or breathing out.
  2. 16 September, 14:14
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    The correct answer would be "the rib cage expands".

    Inhalation is the process by which atmospheric air is drawn inside the body.

    It occurs when the intrapulmonary pressure is less than atmospheric pressure.

    It is initiated by the contraction of diaphragm and external intercostal muscles.

    These contractions lift up the ribs and the sternum which increases the thoracic volume.

    Consequently, the pulmonary volume is increased due to which intra-pulmonary pressure becomes less than atmospheric pressure which pulls the air from outside the body to move into the lungs.
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