Figure 23-2 Mechanics of Ventilation
Use Figure 23-2 to answer the following questions:
-Which muscle(s)contract(s)to cause the movement indicated by the arrows labeled "6" and "7"?
A)rectus abdominis
B)internal intercostals
C)external intercostals
D)diaphragm
E)both rectus abdominis and internal intercostals

Question

Figure 23-2 Mechanics of Ventilation
Use Figure 23-2 to answer the following questions:
-Which muscle(s)contract(s)to cause the movement indicated by the arrows labeled "6" and "7"?
A)rectus abdominis 
B)internal intercostals 
C)external intercostals 
D)diaphragm 
E)both rectus abdominis and internal intercostals

Quizplus · Accepted Answer

The movement indicated by the arrows likely involves expiration, which is facilitated by the contraction of the rectus abdominis and internal intercostals.