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Unformatted text preview: - alveolar dead space: in alveoli &amp; respiratory zone- total dead space: anatomic + alveolar dead space Pulmonary Function Tests:- minute or total ventilation: total amount of gas that flows into or out of the respiratory tract in 1 minute o during normal quiet breathing, ~ 6 L/min. (500 ml/breath x 12 breaths/min.)- forced vital capacity (FVC): measures amount of gas expelled following deep breath &amp; forceful exhalation o forced expiratory volume (FEV) : determines amount of air expelled during specific intervals or FVC test Alveolar ventilation: AVR = frequency (breaths/min.) x (TV dead space)- measures respiratory efficiency taking dead space into account- normally ~ 4200 ml/min. Nonrespiratory air movements: processes other than breathing that affect air entrance or exit from lungs- examples: laughing, sneezing, coughing- mostly reflex, sometimes voluntary PAGE6...
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- Fall '10
- Anthropology, IRV, respiratory tract