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Biology
Genetics
Cell Biology (cytology)
Cell or Plasma Membranes

The cell membrane is made of?

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January 18, 2008 2:27AM

The cell membrane in eukaryotic organisms and most prokaryotic organisms is a phospholipid bilayer. Hydrophobic tails face each other while hydrophilic heads face either direction (outside and inside the cell). This creates a nearly impassible wall keeping cellular material inside the cell and extracellular material outside the cell. The membrane also includes integral proteins which help with transmembrane transportation as well as cellular structure. Other sugars and fats such as cholesterol can be found within the membrane depending on the organism.