Lipids ( Fats)

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

Examples of Lipids Fats Phospholipids Waxes Steroids

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

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

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

Unsaturated Fat- the good fat At least ONE pair of carbon in the hydrocarbon chain are connected by a DOUBLE bond

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

Phospholipid Structure

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

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

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