Respiratory pressure, volume, and capacity Flashcards
quiet tidal volume
the volume of air exchanged during one cycle of quiet respiration
inspiratory reserve volume
the volume of air that can be inhaled after a tidal inspiration
expiratory reserve volume
the volume of air that can be expired following passive, tidal expiration
residual volume
the volume of air remaining in the lungs after maximum exhalation
vital capacity
the volume of air that can be inhaled following a maximal exhalation; includes inspiratory reserve volume, tidal volume, and expiratory reserve volume (VC = IRV + TV + ERV)
functional residual capacity
the volume of air in the body at the end of passive exhalation; includes expiratory reserve and residual volumes (FRC = ERV + RV)
inspiratory capacity
the maximum inspiratory volume possible after tidal expiration (IC = TV + IRV)
total lung capacity
the sum of inspiratory reserve volume, tidal volume, expiratory reserve volume, and residual volume (TLC = IC + FRC)
effect of age
as we age, our vital capacity goes down, while our residual volume goes up
pressures of the respiratory system
atmospheric, intraoral, subglottal, alveolar, and intrapleural
intraoral pressure
air pressure measured within the mouth
positive
alveolar pressure
air pressure measured at the level of the alveolus in the lung
leaning towards positive
intrapleural pressure
pressure in the space between parietal and visceral pleurae
always negative
subglottal pressure
pressure below the vocal folds
positive
atmospheric pressure
always 0
