During quiet expiration, the return of the lungs to their resting position is dependent upon ____.
A)diaphragm contraction
B)internal intercostal muscle contraction
C)the increased volume of the lungs
D)oxygen levels reaching their peak
E)elastic recoil of the chest wall and lungs

Question

During quiet expiration, the return of the lungs to their resting position is dependent upon ____. ​
A)diaphragm contraction
B)internal intercostal muscle contraction
C)the increased volume of the lungs
D)oxygen levels reaching their peak
E)elastic recoil of the chest wall and lungs ​

Quizplus · Accepted Answer

During quiet expiration, the diaphragm and external intercostal muscles relax, and the lungs passively recoil back to their resting position. This recoil is due to the elastic fibers in the lungs and the chest wall, resulting in a decrease in the volume of the thoracic cavity and the lungs. Therefore, the return of the lungs to their resting position is dependent upon the elastic recoil of the chest wall and lungs.

During Quiet Expiration, the Return of the Lungs to Their