LIPIDS --- Fats & Oils
LIPIDS include: fats oils cholesterol phospholipids
Function:energy storage fats and oils are a source of stored chemical energy.
Animals - fats Plants - oils
Structure cell membranes are composed of phospholipids
Protection:
insulates body
---think whale blubber!
cushions organs
&
OilWater
A lipid is a nonpolar molecule that does not dissolve in water.
Lipids: composed mostly of carbon and hydrogen.
Lipids have a higher ratio of carbon and hydrogen than carbohydrates, so they store more energy per gram.
Fats have more energy per gram than carbohydrates.
Some lipids are composed of fatty acids.
A fatty acid is a long unbranched carbon chain—(usually 16 to 18 H-C-H).
FATS & OILS: Triglycerides
Fats and oils are composed of 1 glycerol and 3 fatty acids.
Saturated fatty acid: all single bonds C-H
Unsaturated fatty acid: contains double bonds
Saturated Fats:animal fats solid at room temperaturecontributes to heart disease deposits in arteries
Limit the amount in your diet
Unsaturated Fats:Plant, vegetable & fish fats liquid at room temperatureBetter choice in your diet
Phospholipids: 1 phosphate 1 glycerol, 2 fatty acids