Cell Membrane DiagramVersión en línea Label the parts of the cell membrane. por Dominick Bellini 1 2 3 4 5 6 7 1 2 3 4 5 6 7 Explanation 1 Combination of carbohydrates and lipids. 2 A lipid comprised of four fused carbon rings. 3 Protein integrated into the membrane structure that interact extensively with the membrane lipids' hydrocarbon chains and often spans the membrane. 4 Protein at the plasma membrane's surface either on its exterior or interior side. 5 Combination of carbohydrates and proteins. 6 Chains of 2-60 monosaccharide units. Always on the cell's exterior surface and are bound to either proteins or to lipids. 7 A two-layered arrangement of phospholipids where the hydrophobic tails face inward, and the hydrophilic heads face outward.