The force responsible for normal expiration is supplied by the

Question

Quizplus · Accepted Answer

Elastic recoil of lung tissue and the thoracic cage are responsible for normal expiration. As the diaphragm and external intercostal muscles relax, the elastic fibers in the lungs and chest wall recoil, pushing air out of the lungs. The alveoli and smooth muscles in the airways play a role in the control of breathing, but are not responsible for the force of normal expiration.

The Force Responsible for Normal Expiration Is Supplied by the