Figure 21-2
-Which muscle(s)contract(s)to cause the movement indicated by the arrows labeled "6" and "7"?

Question

Quizplus · Accepted Answer

The movement indicated by arrows labeled "6" and "7" refers to quiet expiration, which is a passive process not requiring the contraction of muscles. Instead, it relies on the natural elasticity of the lungs and thoracic cage to return to their resting state after the active process of inhalation.

Figure 21-2 -Which Muscle(s)contract(s)to Cause the Movement Indicated by the Arrows Labeled