Normal exhalation involves all of the following EXCEPT:
A) decreased intrathoracic volume.
B) phrenic nerve stimulation.
C) relaxation of the diaphragm.
D) elastic recoil of lung tissue.

Question

Quizplus · Accepted Answer

Exhalation involves a passive process of relaxation of the diaphragm and elastic recoil of lung tissue, leading to decreased intrathoracic volume and air being expelled out of the lungs. The phrenic nerve is involved in inhalation, not exhalation.

Normal Exhalation Involves All of the Following EXCEPT