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Naya [18.7K]
4 years ago
7

Why does diffusion occur across a cell membrane?

Biology
1 answer:
natka813 [3]4 years ago
8 0
Simple passive diffusion occurs when small molecules pass through the lipid bilayer of a cell membrane. Facilitated diffusion depends on carrier proteins imbedded in the membrane to allow specific substances to pass through, that might not be able to diffuse through the cell membrane
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