1. Lipids: Fats & Oils

2. Concentrated energy molecules
Lipids
Concentrated energy molecules

3. Lipids Examples fats oils waxes hormones sex 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. Glycerol backbone w/ 3 fatty acids
Notice: C H O
In an “E” structure
Structure of Fat
not a chain (polymer) = just a “big fat molecule”
Glycerol backbone w/ 3 fatty acids

6. Saturated fats Most animal fats Limit the amount in your diet
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 tightly together
Better choice in your diet

8. Saturated vs. 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
Hydrophilic
tails are on inside away from water
Hydrophobic
forms a barrier between the cell & the outside

11. Let’s build some Lipids!