3493311
Frage 1
Frage
Regarding the alveolar-capillary diffusion
Antworten
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The atrial pressure of O2 or CO2 in blood is due to the gas that is dissolved in plasma
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Once an O2 or CO2 gas molecule binds to hemoglobin it no longer contributes to the partial pressure of the gas
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Once equilibrium between alveolar and capillary is reached, there is no more diffusion
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Partial pressure of gas = gas tension
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all of the above are correct
Frage 2
Frage
O2 and CO2 are equally the same in solubility
Antworten
- True
- False
Frage 3
Frage
Diffusion rate - which of the following is not true
Antworten
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Directly proportional to the area, solubility and driving pressure
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Inversely proportional to the thickness or distance
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Loss of capillaries and alveoli will increase area and decrease distance
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Concentration difference will affect the driving pressure
Frage 4
Frage
High altitudes can decrease the oxygen pressure gradient --> less O2 will diffuse into the blood because now there's a lower driving pressure
Antworten
- True
- False
Frage 5
Frage
Diffusion capacity of lung - different gases
Antworten
-
CO is purely diffusion limited
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N2O is purely perfusion limited
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O2 is mixed (mainly perfusion limited)
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all of the above are correct
Frage 6
Frage
all of the following will decrease DLCO (diffusion of CO) except?
Antworten
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anemia
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pulmonary fibrosis
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emphysema
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Polycythemia
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