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- DictionaryCell mem·brane
noun
- 1. the semipermeable membrane surrounding the cytoplasm of a cell.
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- Cell membrane
Biological membrane that separates the interior of a cell from its outside environment
The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space). The cell membrane consists of a lipid bilayer, made up of two layers of phospholipids with cholesterols (a lipid component) interspersed betw... Wikipedia
