inhalation and exhalation

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1. which of these cause the ribcage to move up and out during inhalation

  • external intercostal muscles contract
  • bronchioles
  • diaphragm muscles contract
  • high diffusion gradient
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2. during exhalation which of these pull the ribs down and in

  • intercostal muscles
  • chest cavity
  • diaphragm muscles
  • pleural membrane

3. during exhalation which of these decrease in volume

  • bronchioles
  • ribs
  • chest cavity
  • alveoli

4. what allows air to flow into the lungs during inhalation

  • lower pressure in the lungs than outside the body
  • pleural membrane
  • the heart
  • alveoli

5. which of these cause the diaphragm to flatten during inhalation

  • gaseous exchange
  • diaphragm muscles contract
  • external intercostal muscles contract
  • volume of chest cavity expands

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