Kinesiology 2230A/B Lecture Notes - Lecture 14: Exhalation, Trachea, Bronchus

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2230A/B
• Professor: Glen Belfry

Document Summary

Birds: near- constant, one- way airflow through their lungs, as they inhale and exhale the air that ultimately flows through the lungs is always going to be fresh air. Ve=vtxf: what if frequency increases and vt decreases so that ve remains the same, we always want to keep our ventilation per minute the same. If we"re taking short breaths we need to take a lot more during that minute that when taking deep breaths: deadspace= approx. 250ml: this is where no gas exchange occurs, does(cid:374)"t (cid:272)ha(cid:374)ge, the larger your breath, the greater your alveolar ventilation, va= alveolar ventilation. Inspiration: pressure becomes less negative pleural cavity prevents this: even at end of expiration when you have volume in the lungs there is still movement of o2 into the capillaries over the cardiac cycle. Composition of air: gases make up the air for the most part, nitrogen (97. 04%, oxygen (20. 93%, argon (0. 9340%, carbon dioxide (0. 03%)