Resp: Pulm Mech and Ventilation Flashcards
what does boyles law tell us
“changes in lung volumes drive pressure gradients and air flow” - explain what this statement means
when does the diapragm move down
when does the diaphragm move up
when is atmospheric pressure greater than alveolar pressure? why
when is alveolar pressure greater than atmospheric pressure and why
during inspiration are muscles active or inactive
describe whats happening to the ext intercostals, diaphragm, sternum, and ribs during inspiration
describe what happens to internal intercostals during expiration
when are expiratory muscles inactive? when are they active?
what is the role of pleural fluid
why do you want the pleural pressure to be -3mmhg
what happens to pleural fluid during pneumothorax
how would wet dressing help a pneumothorax
describe the changes in alveolar pressure during quiet breathing
describe the changes in interpleural pressure during quiet breathing
describe the changes in the volume of air moved during quiet breathing
what is lung compliance
what is lung compliance influenced by
contrast elasticity vs compliance
how do elastin fibers influence compliance
what happens to lung elasticity with age
what is distending pressure
how does the lung compliance curve change with emphysema. why
how does the lung compliance curve change with fibrosis. why
what does surface tension do to the alveolus wrt pressure and volume
what does surfactant do in the alveoli
what does surface tension do to elasticity in the alveoli. why?
what is the law of laplace
what type of airflow occurs in the lungs
what type of airflow occurs in the alveoli
what type of airflow occurs at bifurcations
what causes changes in resistance in the airway
when would bronchoconstriction occur
when would bronchodilation occur
what happens to the difference in intraalveolar pressures during insp and exp with increased vs normal resistance
what is total pulmonary ventiliation
what is alveolar ventilation / fresh air
describe the process of dead space, stale air, refilling
