During inspiration, intercostal muscles function to
A) flatten the diaphragm.
B) pull the rib cage up and out, so that lung volume increases.
C) constrict the lungs so that intrapulmonary pressure increases.
D) separate the layers of pleural membranes.
E) increase blood flow to lung tissue.

Question

Quizplus · Accepted Answer

During inspiration, the intercostal muscles contract to elevate the ribs and expand the chest cavity, increasing lung volume and decreasing intrapulmonary pressure, allowing air to flow into the lungs.

During Inspiration, Intercostal Muscles Function to