Figure 23-2 Mechanics of Ventilation

Use Figure 23-2 to answer the following questions:
-Which muscle(s) produce(s) the movement labeled "1"?
A) rectus abdominis
B) internal intercostals
C) external intercostals
D) diaphragm
E) both rectus abdominis and external intercostals

Question

Figure 23-2 Mechanics of Ventilation
 
Use Figure 23-2 to answer the following questions:
-Which muscle(s) produce(s) the movement labeled "1"?
A) rectus abdominis 
B) internal intercostals 
C) external intercostals 
D) diaphragm 
E) both rectus abdominis and external intercostals

Quizplus · Accepted Answer

The external intercostals are responsible for elevating the ribs during inspiration, which is typically the movement labeled "1" in diagrams of respiratory mechanics.