inhalation and exhalation

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

  • external intercostal muscles contract
  • gaseous exchange
  • diaphragm muscles contract
  • volume of chest cavity expands
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2. during exhalation which of these pull the ribs down and in

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

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

  • bronchioles
  • external intercostal muscles contract
  • high diffusion gradient
  • diaphragm muscles contract

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

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

5. during exhalation which of these decrease in volume

  • ribs
  • chest cavity
  • bronchioles
  • alveoli

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