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APHY 102 Lab 1 Exam

Respiratory Acronyms

QuestionAnswer
what is TV? tidal volume. the air that moves in and out of the lungs with each breath. approx 500mL
what is IRV? inspiratory reserve volume. air that's forcibly inspired beyond tidal volume. approx 2100-3200mL
what is ERV? expiratory reserve volume. air that can be expired from lungs after a tidal expiration. approx 1000-1200mL
what is RV? residual volume. air left in lungs after strenuous expiration. approx 1200mL
what is IC? inspiratory capacity. total amount of air that can be inspired after tidal expiration. IC = IRV + TV
what is FRC? functional residual capacity. amount of air remaining in lungs after tidal expiration. FRC = RV + ERV
what is VC? vital capacity. total amount of exchangeable air. VC = TV + IRV + ERV
what is TLC? total lung capacity. sum of all lung volumes. approx 6000mL in males
what is total ventilation? not to be confused with tidal volume total amount of gas flow into or out of the respiratory tract in one minute
what is FVC? forced vital capacity. gas forcibly expelled after taking a deep breath
what is FEV? forced expiratory volume. amount of gas expelled during specific time intervals of the FVC (forced vital capacity) -- a healthy adult has FEV of 75-85% in 1 sec; you'd get lower values with thoracic muscle weakness or airway obstruction
increases in TLC, FRC, RV may occur as a result of what? obstructive or restrictive disease obstructive disease in which air cannot be completely expelled from the lungs
reductions in VC, TLC, FRC, RV result from what? obstructive or restrictive restrictive disease -- can't expand lungs fully due to restrictions (can't expand lungs fully due to restrictions (pulmonary fibrosis as in black lung disease or tuberculosis)
what is AVR? alveolar ventilation rate. measures flow of fresh gases into and out of alveoli during a particular time. AVR = breaths/min x (TV - dead space)
what would increase or decrease AVR? slow, deep breathing increases AVR, and rapid, shallow breathing decreases AVR
Created by: elianayu
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