Question

select all that apply
select all that describes expiration.
rib cage moves down and in.
pressure in the lungs decreases.
internal intercostal muscles pull the ribs inward.
diaphragm relaxes and moves up.
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Explanation:

During expiration (exhalation), the rib cage moves down and in (as the internal intercostal muscles pull the ribs inward), and the diaphragm relaxes and moves up. This increases the pressure in the lungs (not decreases, so the option about lung pressure decreasing is incorrect).

Answer:

• Rib cage moves down and in.
• Internal intercostal muscles pull the ribs inward.
• Diaphragm relaxes and moves up.