| Membranes |
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| • | Plasma
membrane separates “inside” from |
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| “outside”
of cell |
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| • | Organelles
in eukaryotic cells surrounded |
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| by
specific membranes |
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| • | Membranes
serve as barriers to contain |
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| most
substances on one side or the other |
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| • | Only
small, lipid soluble, molecules are |
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| permeable
to membranes |
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