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The cell membrane is composed of the lipid bilayer. In addition to lipids most membranes contain proteins and carbohydrates. ________________________________________________________________. YOUR finger nails and hair are made out of Keratin. its a protein (so is whale baleen and animal horns)
Quick Answer. The cell membrane is comprised of phospholipids and proteins. The phospholipids are oriented so that their hydrophilic, polar heads face outwards and their hydrophobic, non-polar tails face inwards toward the middle of the cell. Proteins dot the cell membrane to allow solutes to be transported in and out of the cell membrane.