1. Lipids: Fats & Oils

2. Concentrated energy molecules
Lipids
Concentrated energy molecules

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

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

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

6. Lipids Large, nonpolar organic molecules Do not dissolve in water
Have a higher ratio of carbon and hydrogen atoms to oxygen atoms than the carbohydrates 1:2:1
Store more energy in carbon-hydrogen bonds

7. Lipids Most lipids are made of Fatty Acids = unbranched carbon chains
Two Types of fatty acids…

8. Saturated fats (single bonds)
Most animal fats
solid at room temperature
Limit the amount in your diet
contributes to heart disease
deposits in arteries

9. Unsaturated fats (double bond(s))
Plant, vegetable & fish fats
liquid at room temperature
the fat molecules don’t stack tightly together
Better choice in your diet

10. Saturated vs. Unsaturated

11. Triglycerides Phospholipids Waxes Steroids Classes of Lipids:

12. Triglycerides: Three fatty acids and one glycerol
Butter, Fat in red meat, In plant seeds…

13. Phospholipids: Two fatty acids + a glycerol Create lipid bilayers

14. Waxes & Steroids
Cholesterol
Lipids