KINE 3012 Lecture Notes - Lecture 3: Broccoli, Homeostasis, Transpulmonary Pressure
29 Jan 2018
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(for this lecture only when the prof is talking about alveolus or lungs, it is the same thing) Pressures that exist in the system that we talked about so far: the atmospheric (patm) alveolar (palv) and intrapleural (pip) pressures. Atmospheric pressure is the pressure of the air around you. Approximation of atmospheric pressure is 760 millimeters of mercury (units= millimeters of mercury(mmhg)) We don"t feel the atmospheric pressure, if you have bad sinuses sometimes you do, if you have headaches sometimes you can feel when the pressure outside changes, but normally most people don"t. Atmospheric pressure never changes, we don"t have the ability to change atmospheric pressure. The image is a cumulative picture of all the alveoli put together, and the air in there has a pressure (air in a container has a pressure) And the intrapleural space, the fluid in there has a pressure.
