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tidal volume
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inspiratory reserve volume
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respiratory phys

physiology of physiology

QuestionAnswer
tidal volume volume inspired or expired with each normal breath
inspiratory reserve volume volume that can be inspired over and above tidal volume
expiratory reserve volume volume that can be expired after the expiration of a tidal volume
residual volume volume that remains in the lungs after maximal expiration
anatomic dead space volume in conductin airways
physiologic dead space functional measurement, volume of the lungs that does not participate in gas exchange
minute ventilation tidal volume X respiration rate
alveolar ventillation ( tidal volume- dead space) X respiration rate
Inspiratory capacity sum of tidal volume and inspiratory reserve volume
functional residual capacity sum of expiratory reserve volume and residual volume; remains in lungs after tidal volume is expired
vital capacity volume of air that can be forcibly expired after maximal inspiration
vital capacity tidal volume + inspiratory reserve volume+ expiratory reserve volume
muscels of inspiration diaphragm and external intercostals
muscles of expiration normally passive, used during exercise; includes abdominal muscles and internal intercostals
compliance of respiratory system distensibility of lungs and chest wall; inversly related to elastance
surfactant reduces surface tension and increases compliance, is produced starting gestational week 24-35
surfactant synthesized by type II alveolar cells and consits primarily of DPPC; lecithin:sphingomyelin ratio >2:! indicates mature levels of surfactant
during rest alveolar pressure equals atmospheric pressure, intrapleural pressure is negative
during inspiration alveolar pressure becomes negative causing a presure gradient, intrapleural pressure becomes more negative
during expiration alveolar pressure becomes postitive, intrapleural pressure returns to resting value
Created by: swohlers
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