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OpenStudy (anonymous):

what is a cell membrane

OpenStudy (funnyguy2):

The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins. source: https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=cell+membrane+function

OpenStudy (samanthagreer):

the semipermeable membrane surrounding the cytoplasm of a cell.

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