1. JACKIE MALDONADO Lipids

2. Also called triglycerides Contain oxygen, hydrogen and carbon. Made of three fatty acids and one glycerol by condensation reaction Hydrophobic due to the long neutral hydrocarbon chain Two types of lipids: fats and oils  Fats contain saturated fatty acids, solid at room temp. ex.butter and animal fat. Unsaturated fats present in plants, olive oil, sunflower oil

3. Saturated fatty acid-no double bonds

4. Saturated(nodoublebond) and Unsaturated

5. Ester bonds forms between glycerol and fatty acids

6. Phospholipids Made of one glycerol 2fatty acids and a phosphate group. The fatty acid tails can be saturated of unsaturated Major constituent of cell membrane Phosphate head negatively charged, tails neutral Partly hydrophobic and partly hydrophilic

7. Functions of lipids Energy production- twice the energy of content of carbs and pro. Heat insulation-layer of fat insulate the body against temperature changes. Storage molecule (fat)-stored without water not adding much body weight. Useful for migration of birds Shock absorbent-protects organs in the body. Some derivatives acts as hormones (testosterone, oestrogen) and component of cell membrane Provide buoyancy- aquatic animals floating. Electric insulator in nerve cell (myelin sheet)