Figure 21- 2 Mechanics of Ventilation

question 109

Multiple Choice

Figure 21- 2 Mechanics of Ventilation
Use Figure 21- 2 to answer the following questions:
-Which muscles) produces) the movement labeled "1"?

• A) external intercostals
• B) internal intercostals
• C) rectus abdominis
• D) diaphragm
• E) both A and C

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