Chapter 10 Lipids
Chapter 10 Lipids
1. Lipids encompass a large and diverse group of organic compounds II Lipids are broadly defined as biological molecules that are soluble in organic solvents 1.1.1 Lipids are usually extracted from biological materials by nonpolar solvents like ether, chloroform(氯仿), benzene(苯) 1.2 The biological functions of lipids are diverse。 1. 2. 1 Certain lipids(e.g, triacylglycerols (三脂酰甘油), commonly called fats) serve as efficient reserves for the storage of energy
1. Lipids encompass a large and diverse group of organic compounds 1.1 Lipids are broadly defined as biological molecules that are soluble in organic solvents. 1.1.1 Lipids are usually extracted from biological materials by nonpolar solvents like ether, chloroform（氯仿）, benzene（苯）. 1.2 The biological functions of lipids are diverse. 1.2.1 Certain lipids (e.g., triacylglycerols （三脂酰甘油）, commonly called fats) serve as efficient reserves for the storage of energy
1.2.2 Lipids(including mainly g! ycerophospholipids甘油裤脂)2 sphingolipid and sterols ) are the major structural elements or s, the biomembranes 1.2.3 The water-insoluble vitamins like vitamin A, D, e, k and some hormones (like steroids(类醇), prostaglandins(前列腺素)) are lipids 1. 2. 4 The bile acids help to solubilize(emulsify other classes of lipids for better digestion. 1. 2. 5 Lipids also serve as enzyme cofactors light-absorbing pigments, intracellular messengers
1.2.2 Lipids (including mainly glycerophospholipids （甘油磷脂）, sphingolipids, and sterols) are the major structural elements of the biomembranes. 1.2.3 The water-insoluble vitamins like vitamin A, D, E, K and some hormones (like steroids（类固醇）, prostaglandins（前列腺素）) are lipids. 1.2.4 The bile acids help to solubilize (emulsify) other classes of lipids for better digestion. 1.2.5 Lipids also serve as enzyme cofactors, light-absorbing pigments, intracellular messengers
Fat cells of guinea pig (a) 8 m
Fat cells of guinea pig
A cotyledon cell from a seed of the plant arabidopsis ● (b) 3 um
A cotyledon cell from a seed of the plant arabidopsis