1. Lipids ( Fats)

2. Elements Present Carbon Hydrogen Oxygen ( fewer)
**Sometimes Phosphorous (P)
***NOT a 1:2:1 ratio***

3. Examples of Lipids
Fats
Phospholipids
Waxes
Steroids

4. FATS Structure- glycerol + 3 fatty acids= triglyceride
Function- stores energy
for long term use,
Insulation

5. Saturated Fat
The carbons in the hydrocarbon chain are all connected by SINGLE bonds
the chain is straight

6. Characteristics of Saturated Fats
1) Fat molecules are tightly packed
2) Fat is solid at room temp Ex: lard,butter
3) Promotes build up of deposits on walls of blood vessels

7. Unsaturated Fat- the good fat
At least ONE pair of carbons in the hydrocarbon chain is connected by a DOUBLE bond

8. Phospholipids Structure- has a hydrophilic head ( likes water)
has a hydrophobic tail ( dislikes water)
has phosphorous
Function- found in cell membranes,
controls what crosses into a cell

9. Phospholipid Structure

10. Steroids
Structure- 4 fused carbon rings with different functional groups attached

11. Function of Steroids Chemical signal in the body Ex:
Cholesterol and hormones like estrogen and testosterone
***** Found in membranes of cells
***HIGH levels are bad

12. Waxes Structure: fatty acids and certain alcohols, solid at room temp.
Function: waterproofing