Unformatted text preview: on one end and hydrophilic on the other. Thus, the most energetically favorable arrangement is a double layer with the hydrophilic "heads" on the outside and the hydrophobic "tails" facing each other on the inside. Figure 1 The second major lipid in the cellular membrane is cholesterol . Cholesterol affects the fluidity of the membrane; the less cholesterol in the membrane the more rigid the membrane, while the higher the concentration of cholesterol the more fluid the membrane. Some cells require great flexibility (like red blood cells) while other cells require more rigid shapes. Glycolipids constitute about 5% of the lipids and are found only on the extracellular side. These special lipids contribute to the glycocalyx of the cell. The glycocalyx functions to allow cellular adhesion as well protection from harmful extracellular substances....
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- Fall '10