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CONCENTRATION GRADIENT
If a substance is more concentrated outside a cell than inside, the molecules will tend to diffuseinto the cell
If a substance is more concentrated inside thecell than outside, the molecules will tend todiffuse out of the cell
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The concentration of oxygen molecules isgreater outside the cellthan inside
So the oxygen moleculesdiffuse into the cell
CONCENTRATION GRADIENT9
DIFFUSION PATHWAY
Diffusion takes place more quickly through thin membranes because there is only a short diffusion pathway.The shorter the distance between the two regions , the faster the rate
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