In which direction will CO2 flow if the PCO2 in the alveoli were normal and PCO2...

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Medical Sciences

In which direction will CO2 flow if the PCO2 in the alveoli werenormal and PCO2 in the venous blood entering the lungs were 30mmHg?
a) CO2 will diffuse out of the pulmonary capillaries, and intothe alveoli.
b) CO2 will diffuse out of the alveoli, and into the pulmonarycapillaries.
c) No net diffusion of CO2 will occur because the partialpressures of CO2 within the tissues and systemic capillaries are atequilibrium. d) It cannot be determined without knowing the partialpressures of O2 and H2O, within the tissue and systemic capillariesas well.

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4.0 Ratings (421 Votes)

B is the correct answer ie CO2 will diffuse out of the alveoli and into the pulmonary capillaries Explanation Henrys Law a Gasses dissolve into liquids in proportion to their partial pressures b The direction of gas movement between dissolved and undissolved is determined by the partial pressures in the two phases The gas will flow in a direction to See Answer

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