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3.3 The process of breathing  (Page 14/49)

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14 / 49  Contraction of the external intercostal muscles causes which of the following to occur?
A  The diaphragm moves downward.
B  The rib cage is compressed.
C  The thoracic cavity volume decreases.
D  The ribs and sternum move upward.
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Practice MCQ 6 FlashCards 3 Key Terms 31

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Source:  OpenStax, 101-321-va - vertebrate form and function ii. OpenStax CNX. Jul 22, 2015 Download for free at https://legacy.cnx.org/content/col11850/1.1
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