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5 Cards in this Set

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The composition of alveolar gas remains relatively constant at rest. TRUE/FALSE
TRUE. The average FRC is 2.8 L, thus each increment of inspired and expired air(average 500ml) has relatively little effect on PO2 and PCO2.
Define gas exchange.
Transport of gas from alveoli to Hb in the blood across the respiratory membrane.
Where in the respiratory system does gas exchange occur?
In the terminal portions of the airways(respiratory bronchioles, alveolar ducts and alveoli.
At rest, how long does it take for the blood to traverse the pulmonary capillaries?
0.75 second
What factors determine pulmonary gas diffusion?
Partial pressure differences across the membrane and the area available for diffusion.