Cell Membrane …71.

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Presentation transcript:

Cell Membrane …71

Cell Membrane…page 71 Allows material into and out of the cell Semi permeable (some) Made of a phospholipid bilayer OSMOSIS-brings water into and out of the cell DIFFUSION-brings other materials in/out of the cell (Oxygen, food)

Active transport – the movement of molecules across a cell membrane from an area of low concentration to high concentration Low to high requires energy Passive transport – the movement of molecules from an area of high concentration to low concentration. High – low does not require energy diffusion and osmosis

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