Kinesiology 2230A/B Study Guide - Pressure Gradient, Partial Pressure, Total Pressure

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Takes huge amount of energy and o2 to start flying. Higher up in the sky, less atmospheric pressure. Into the lung via air sacs, out via the windpipe: allows for near constant, one-way air flow through their lungs. Every flap of wings, air moves in and out. Inhale, lungs fill up, exhale, air sacs get pushed forward. Air posterior first then anterior therefore always have fresh air in lungs. Gas diffuse from high to low pressure. Total pressure = sum of partial pressures (dalton"s law) If barometric pressure = 760mmhg: po2= 760mmhg x 20. 93% = 159 mmhg. % becomes . 2093: pco2 = 760 x . 0003 = . 23 mmhg, pn2 = 760 x . 7904 = 600 mmhg. Henry"s law: gases dissolving in liquid are in proportion to pp"s. At the end of inspiration: chest wall: contained, as it expands volume increases, pressure decreases, pressure gradient moves things in between gas in alveoli and drives o2 into lungs.