LINGUIST 3C03 Study Guide - Midterm Guide: Functional Residual Capacity, Spirometer, Intrapleural Pressure

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What are the two types of respiration? quiet and forced inspiration and passive and active expiration. Passive expiration: system is restored to a resting position after respiration, driven by forces of elasticity, and gravity. Active expiration: muscular effort enhances act of expiration, abdomen is compressed, muscles reduce size of thorax, rib cage is pulled down, air is pulled out of the lungs. Spirometer ignores the pressure required to raise the container used to measure respiration. Manometer: pressure (bc both breathing in and out) You can measure what they can expel, you cant mwasure what they cant expel. The force of the subject"s expiration is exerted on a column of water that rises as a result. The more force the person uses, the higher the column rises. Measured in inches or centimeters (of h2o displaced. Need a certain pressure to overcome the mass. More force = the higher the water rises. Not about litres of air you put in.