cell membrane. cell membrane (lipid bilayer, plasma membrane) function – regulates what enters and...
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![Page 1: Cell Membrane. Cell Membrane (Lipid Bilayer, Plasma Membrane) Function – Regulates what enters and leaves the cell and also provides protection and support](https://reader030.vdocuments.net/reader030/viewer/2022020208/56649ea05503460f94ba3da9/html5/thumbnails/1.jpg)
Cell Membrane
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Cell Membrane (Lipid Bilayer, Plasma Membrane)
•Function – Regulates what enters and leaves the cell and also provides protection and support.
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Cell Membrane (Lipid Bilayer, Plasma Membrane)
•Structure – A double layered sheet. Gives the cell membrane a tough, flexible structure.
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Cell Membrane (Lipid Bilayer, Plasma Membrane)
•Selectively Permeable – Allows only certain substances to pass through.
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Passive Transport
• Movement of molecules across a membrane that does NOT require energy.
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Passive Transport
• Diffusion – Movement of molecules from an area of high concentration to an area of low concentration.
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Passive Transport
• Osmosis – Diffusion of water.
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Active Transport
• Movement of molecules across a membrane that DOES require energy.