| plasma membrane 
 
 a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell;
 proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell
 - all cells have a cell membrane
 • Syn:
 cell membrane, cytomembrane
 • Hypernyms:
 semipermeable membrane
 • Part Holonyms:
 cell
 
 
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