alleryWhy is quiet exhalation at rest largely passive?
AThe diaphragm contracts strongly
BLungs and chest wall recoil elastically
CExternal intercostals contract
DAbdominal muscles push air out
Answer & Solution
Correct answer: B. Lungs and chest wall recoil elastically
When the inspiratory muscles relax, the elastic recoil of the lungs and chest wall returns the chest to rest.
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