____ is always ____, while ____ may be ____.

Name: ____ is always ____, while ____ may be ____.
Brand: Quizplus
Rating: 4.9 (42 reviews)

Question

Quizplus · Accepted Answer

During inhalation, the muscles of the diaphragm and rib cage contract to actively expand the thoracic cavity and draw air into the lungs. This is an active process. During exhalation, the muscles relax and the elastic recoil of the lungs and chest wall passively push air out of the lungs. Therefore, exhalation is always passive while inhalation may be active.

____ Is Always ____, While ____ May Be ____

Is Always , While May Be