Question

select all that apply
choose all activities that are associated with forced exhalation.

diaphragm contracts
sternum moves posteriorly
diaphragm relaxes
internal intercostals contract
external intercostals contract

Explanation:

• During forced exhalation, the diaphragm relaxes (not contracts). When the diaphragm relaxes, it moves upward.
• The sternum moves posteriorly (backward) as the thoracic cavity volume decreases.
• The internal intercostals contract (external intercostals contract during inhalation).

Answer:

sternum moves posteriorly, diaphragm relaxes, internal intercostals contract