FRANCIS LEROY & OLIVIER WAUTIER, BIOCOSMOS / SCIENCE PHOTO LIBRARY FRANCIS LEROY & OLIVIER WAUTIER, BIOCOSMOS / SCIENCE PHOTO LIBRARY
Animation showing the permeability of the cell membrane to various substances. Small or uncharged molecules, such as oxygen, carbon dioxide, water, benzene and ethanol, diffuse freely through the phospholipid bilayer. However, the bilayer is impermeable to larger or polar molecules such as glucose, amino acids and ions.
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