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Respiration #2
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Airway Resistance Airflow = Pressure / Resistance remember resistance and radius the most important factor contributing to airway resistance is the radius of the airway –implications for exercise (asthsma, bronchitis)
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Pulmonary Ventilation V denotes volume V denotes volume per unit time (minute) subscripts –T - tidal –D - dead space –A - alveolar –I - inspired –E - expired
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Minute volume –V = V T x f Dead space ventilation (V D ) –air that remains in conducting passages –does not participate in gas exchange –anatomical dead space area V D occupies Alveoloar ventilation (V A ) –inspired gas that reaches the respiratory zone
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Spirogram at Rest
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Vital capacity –the maximum amount of gas that can be expired after a maximal inspiration Residual Volume –amount of gas left in the lungs after a maximal expiration
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Vital capacity –the maximum amount of gas that can be expired after a maximal inspiration Residual Volume –amount of gas left in the lungs after a maximal expiration
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Partial Pressures
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Partial Pressures of Gases in the Blood
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