Normal exhalation is usually ____ because of the ____.
A)passive/elasticity of the lungs
B)active/smooth muscle of the lungs
C)passive/expiration center in the pons
D)active/expiration center in the medulla

Question

Quizplus · Accepted Answer

Normal exhalation is a passive process, meaning it does not require active muscle contraction but rather relies on the elasticity of the lungs. This elasticity allows the lungs to naturally recoil and push air out of the body during exhalation. Option B is incorrect because smooth muscle is not involved in normal exhalation, it is involved in bronchoconstriction and dilation. Option C and D refer to the expiration center in the brainstem, which is involved in regulating breathing but not directly in the mechanics of exhalation.

Normal Exhalation Is Usually ____ Because of the ____

Normal Exhalation Is Usually Because of the