. Inspiration is an process in which the and the external intercostal muscles contract, increasing the dimensions, and thus the volume, of the thoracic cage. This decreases the pressure in the lungs, causing air to flow in. (a) passive; diaphragm (b) active; diaphragm (c) active; internal intercostal muscles (d) passive; internal intercostal muscles 2. Inspiration at rest is normally a passive process. The inspiration muscles and diaphragm relax and the elastic tissue of the lung’s recoils, returning the thoracic cage to its smaller, normal dimensions. this increases the pressure in the lungs and forces air out. True or False?! 3. If TV is 0.5 L/breath and RR is 12 breaths/min, what is VE (L/min)?
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