1. Lipids

2. Lipids Examples fats oils waxes hormones steroids sex hormones
testosterone (male)
estrogen (female)

3. Lipids Function: energy storage structure of cell membrane
Supplies more energy than carbohydrates:
1 g. fat = 9cal
1 g. carb = 4 cal
structure of cell membrane
sex hormones
cushions organs
insulates body
think whale blubber!

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

5. Fats: Produced by dehydration synthesis
Fats: Produced by dehydration synthesis * Fats are made with 1 Glycerol molecule and 3 Fatty Acid molecules
Glycerol and fatty acids contain…
CARBON, HYDROGEN, and OXYGEN

6. can be classified as saturated or unsaturated
FATS-
can be classified as saturated or unsaturated

7. Saturated fats Most animal fats- butter, meat fat
solid at room temperature
Limit the amount in your diet
contributes to heart disease
deposits in arteries

8. Unsaturated fats Plant, vegetable, nuts & cold water fish fats (oils)
liquid at room temperature
Better choice in your diet

9. Saturated vs. unsaturated

10. 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

11. 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