Ask your own question, for FREE!
Mathematics 19 Online
OpenStudy (anonymous):

How does air pressure control expiration? A decrease in air pressure within the lungs allows air to flow in. An increase in air pressure within the lungs allows air to flow out. A decrease in air pressure within the lungs causes them to contract. An increase in air pressure within the lungs causes them to expand.

OpenStudy (anonymous):

help please!!!!!

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!