ajkim1's version from 2015-05-31 03:34


Question Answer
Tidal volumeVolume inspired or expired with each normal breath
Inspiratory reserve volume (IRV)Volume that can be inspired over and above the tidal volume; used during exercise
Expiratory reserve volumeVolume that can be expired after the expiration of a tidal volume
Residual volumeVolume that remains in the lungs after a maximal expiration; cannot be measured by spirometry
Physiologic dead spaceVolume of the lungs that does not participate in gas exchange
Inspiratory capacitySum of tidal volume and IRV
Functional residual capacityVolume remaining in lungs after tidal volume is expired
Vital capacityVolume of air that can be forcibly expired after a maximal inspiration
Total lung capacityVolume in the lungs after a maximal inspiration
Forced expiratory volumeVolume of air that can be expired in the first second of a forced maximal expiration; 80% of the forced vital capacity
FEV is reduced more than FVC so that FEV/FVC is decreased in cases ofObstructive lung disease, such as asthma
FEV and FVC are both reduced and FEV/FVC is either normal or increased in cases ofRestrictive lung disease, such as fibrosis


Question Answer
Most important muscle for inspirationDiaphragm
Used during exercise and in respiratory distress, but not for inspiration during normal, quiet breathingExternal intercostals and accessory muscles
Compress the abdominal cavity, push the diaphragm up, and push air out of the lungsAbdominal muscles
Pull the ribs downward and inwardInternal intercostal muscles
When pressure outside the lungs is positive, the lungs _____ and lung volume _____Collapse; decreases
When pressure outside the lungs in negative, the lungs _____ and lung volume _____Expand, increases
Compliance is greatest and the lungs are most distensibleMiddle range of pressures
Compliance in lowest, the lungs are least distensible, and the curve flattensHigh expanding pressures
Major site of airway resistanceMedium-sized bronchi


Question Answer
Responsible for inspirationDorsal respiratory group
Responsible for expirationVentral respiratory group
Stimulates inspiration, producing a deep and prolonged inspiratory gaspApneustic center
Inhibits inspiration and regulates inspiratory volume and respiratory ratePneumotaxic center