Contraction of internal or external intercostal muscles raise the ribs?
External
2 of 5
Name the stages of inspiration...
Diaphragm contracts, external intercostal muscles contact, rib cage raised, volume of thorax increases, pressure in thorax decreases, air moves down a conc. gradient into lungs
3 of 5
Name the stages of expiration...
Diaphragm relaxes, external intercostal muscles relax, rib cage falls, volume of thorax decreases, pressure in thorax increases, air moves down a conc. gradient into atmosphere
4 of 5
Is inspiration an active or passive process?
Active (requires muscular contraction)
5 of 5
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Card 2
Front
Contraction of internal or external intercostal muscles raise the ribs?
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