Air Plasma
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What is the driving force for diffusion of gases across the plasma membrane of a cell?
Gas exchange with the body cells occur at the capillary bed of our circulatory system. I know that the exchange of gases in the lung is done by the difference in the partial pressure of the fluid/ air interface of the lung, but how about across from the fluid to the plasma membrane of the cells? Is it the same driving force, difference of partial pressure of the gas? Or is it the concentration of the gas?
Thank you for answering my question, the textbook doesn't really answer this question.
It is the concentration of gas. Because the lungs/aveoli are rich in oxygen, and blood cells are depleted of oxygen, the gas will go from areas of high concentration to low concentration by passive diffusion.
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