Which muscle(s) is (are) contracted to exhale forcibly?
A) external intercostals and diaphragm
B) internal intercostals and rectus abdominus
C) diaphragm alone
D) rectus abdominis and diaphragm

Question

Quizplus · Accepted Answer

Forcible exhalation involves the contraction of muscles that decrease the volume of the thoracic cavity, primarily the internal intercostals and the rectus abdominis. The internal intercostals pull the ribs downward and inward, reducing the thoracic volume, while the rectus abdominis compresses the abdomen, pushing the diaphragm upwards to force air out of the lungs.

Which Muscle(s) Is (Are) Contracted to Exhale Forcibly