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5 Cards in this Set
- Front
- Back
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The composition of alveolar gas remains relatively constant at rest. TRUE/FALSE
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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.
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Define gas exchange.
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Transport of gas from alveoli to Hb in the blood across the respiratory membrane.
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Where in the respiratory system does gas exchange occur?
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In the terminal portions of the airways(respiratory bronchioles, alveolar ducts and alveoli.
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At rest, how long does it take for the blood to traverse the pulmonary capillaries?
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0.75 second
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What factors determine pulmonary gas diffusion?
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Partial pressure differences across the membrane and the area available for diffusion.
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