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