Which of the following best describes the mechanical process of normal breathing during expiration?

Question

Quizplus · Accepted Answer

During exhalation, two primary components drive the mechanical process- the diaphragm and the intercostal muscles. During inhalation, the lungs fill with air with the help of the intercostal muscles moving up and outward to expand the chest cavity. The diaphragm contracts and pushes downward to make room for the expanded lungs.
During expiration, the opposite movements occur in order to help push air out of the lungs. Thus during exhalation, the diaphragm moves up and the intercostal muscles move the ribs downward.
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Which of the Following Best Describes the Mechanical Process of Normal