are a diverse group of organic compounds that are generally insoluble in water but soluble in nonpolar solvents (like chloroform, benzene, or ether)
Lipids
General Characteristics of lipids
Hydrophobic (non-polar)
Energy-rich
Structural role
Diverse types
Hydrophobic (non-polar)
Do not dissolve in water.
Provide more than 2x the energy of carbohydrates and proteins (about 9 kcal/g).
Energy Rich
Essential components of cell membranes.
Structural Role
Include fats, oils, phospholipids, steroids, and waxes.
Diverse Types
types of lipids
3 types of lipids
Simple lipids
Compound (complex) Lipids
Derived Lipids
Functions of Lipids
•Energy Storage
•Structural Role
•Insulation & Protection
•Hormonal Regulation
•Waterproofing
Most efficient energy reserve of the body.
Energy Storage
Cell membranes are mainly phospholipids and cholesterol.
Structural Role
Protect organs and maintain body temperature.
Insulation and Protection
Steroid hormones regulate metabolism, reproduction, etc.
Hormonal Regulation
Waxes prevent water loss in plants and animals.
Waterproofing