During forced expiration, actively contracting muscles include the

Question

During forced expiration, actively contracting muscles include the (A) diaphragm (B) external intercostals (C) abdominal muscles (D) All of the above

Tardigrade Admin · Accepted Answer

Expiration is a passive process that does not require the involvement of any muscular contraction. In a forced expiration, the abdominal muscles increase infra-abdominal pressure and pull the rib-cage downward and inward.

Q. During forced expiration, actively contracting muscles include the

diaphragm

external intercostals

abdominal muscles

All of the above

Expiration is a passive process that does not require the involvement of any muscular contraction. In a forced expiration, the abdominal muscles increase infra-abdominal pressure and pull the rib-cage downward and inward.