Lipids Structure, types and Functions Part 2

Types of Lipids Triglycerides: Function as a long-term energy source in animals (fats) and plants (oils) Phospholipids: Structural component of cell membranes Steroids: Act as hormones in plants and animals, and is a structural component of animal cell membranes (cholesterol) Waxes: Act as a protective layer against water loss in plant leaves and animal skin Carotenoids: Light-absorbing accessory pigment in plants (involved in photosynthesis) Lipids can serve a diverse range of functions within a cell, including: Storage of energy for long-term use (e.g. triglycerides) Hormonal roles (e.g. steroids such as oestrogen and testosterone) Insulation – both thermal (triglycerides) and electrical (sphingolipids) Protection of internal organs (e.g. triglycerides and waxes) Structural components of cells (e.g. phospholipids and cholesterol)