Which event occurs during inspiration but not expiration?
A) The rib cage moves out and up.
B) The diaphragm relaxes and moves up.
C) Pressure in the lungs increases.
D) Air is pushed out of the lungs.
E) The rib cage moves down and inward.

Question

Quizplus · Accepted Answer

During inspiration, the rib cage moves out and up to increase the volume of the thoracic cavity, which helps draw air into the lungs. This does not occur during expiration, where the rib cage moves in the opposite direction to help expel air.

Which Event Occurs During Inspiration but Not Expiration