Physio Q1 Final

Tidal Volume

Volume of air entering or leaving the respiratory system during a single breath at rest

Inspiratory Reserve Volume

Maximum volume of air inspired over TV

Inspiratory capacity

maximum volume of air that can be inspired

Expiratory reserve volume

volume of air expired by maximum contraction of expiratory muscles, beyond expiration at the end of tidal volume

Residual volume

volume of air in the respiratory system after maximum expiration

Functional residual capcity ( FRC)

voume of air in the respiratory system at the end of normal passive expiration

Vital Capacity

maximum volume fo air that can be moved out during a single breath

Total lung capacity

Maximum volume of air the respiratory system can hold

Forced expiratory volume in 1 second

volume of air expired during the first second of expiration in a VC determination

Compliance

change in volume/change in pressure

Elasticity

change in pressure/change in volume

Increase in PO₂ causes…

more dissolved O₂ and increase in HbO₂

eupnea

normal breathing

dyspnea

difficult or labored breathing, shortness of breath

apnea

transient cessation of breathing

asphyxia

O₂ starvation of tissues caused by a lack of O₂ in the air, respiratory impairment, or inability of the tissue to use O₂

Hypoxia

insufficient O₂ at the cellular level

Medullary respiratory center

primary respiratory center

Cerebal cortex

voluntary control

Pre-Botzinger complex

pacemaker neurons