Cell Membrane

Cell membranes protect/separate the inside contents of the cell from the outside environment.


A cell membrane comprises a lipid bilayer containing proteins.


  • Protection
  • Selectively permeable
    • Control traffic that goes in and out of cell
  • Cell adhesion
  • Ion conductivity
  • Cell signaling
  • Attachment surface for several extracellular structures (e.g. the cell wall)