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Lipids: Fats & Oils

Explore the world of lipids, including fats, oils, and waxes, and their crucial functions in energy storage, cell membranes, and insulation. Learn about saturated and unsaturated fats, as well as other important lipids like cholesterol and phospholipids in cell membranes.

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Lipids: Fats & Oils

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  1. Lipids: Fats & Oils

  2. Concentrated energy molecules Lipids

  3. Lipids • Examples • fats • oils • waxes • hormones • sex hormones • testosterone (male) • estrogen (female)

  4. Lipids • Function: • energy storage • very concentrated • twice the energy as carbohydrates! • cell membrane • cushions organs • insulates body • think whale blubber!

  5. Molecular Structure of Fat not a chain (polymer) = just a “big fat molecule”

  6. Saturated fats • Most animal fats • solid at room temperature • Limit the amount in your diet • contributes to heart disease • deposits in arteries

  7. Unsaturated fats • Plant, vegetable & fish fats • liquid at room temperature • the fat molecules don’t stack tightlytogether • Better choice in your diet

  8. Saturated vs. unsaturated saturated unsaturated 

  9. Other lipids in biology • Cholesterol • good molecule in cell membranes • make hormones from it • including sex hormones • but too much cholesterol in blood may lead to heart disease

  10. Other lipids in biology • Cell membranes are made out of lipids • phospholipids • heads are on the outside touching water • “like” water • tails are on inside away from water • “scared” of water • forms a barrier between the cell & the outside

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