Q:

What are the actions of the intrinsic muscles of the thorax?

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What are the actions of the intrinsic muscles of the thorax?


  1. Only depress the ribs
  2. Only elevate the ribs
  3. Depress and elevate the ribs
  4. Their main action is to stiffen the thoracic wall
  5. Lateral movements of the thoracic wall

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c. Depress and elevate the ribs

d. Their main action is to stiffen the thoracic wall

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