Long term energy storage

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Presentation transcript:

Long term energy storage Lipids Long term energy storage

What elements are Lipids composed of? Carbon (C) Hydrogen (H) Oxygen (O) A whole lot of Hydrogen!!!!!

Function in Living Organisms Lipids usually serve one of three functions: 1. Energy storage When carbs have been used up we use fatty acids for energy.

Function in Living Organisms Lipids usually serve one of three functions: 2. Structural support in cell membranes (phospholipids)

Function in Living Organisms Lipids usually serve one of three functions: 3. Serve as messengers Steroids are lipids that carry messages through the bloodstream.

Lipids do not have true monomers Lipid Monomers? Lipids do not have true monomers

Lipid Polymers 1 Glycerol + 3 Fatty Acids = Triglyceride Glycerol

Lipid Polymers A common lipid that contains fatty acids is a Triglyceride. They are composed of Glycerol linked to three fatty acids (in the shape of an “E”) by condensation reaction.

Lipids DO NOT dissolve in WATER Types of Lipids Lipids are 1.Fats, 2.Oils and 3.Waxes Lipids DO NOT dissolve in WATER

Types of Fatty Acids Fatty acids are classified as: 1. Saturated OR 2. Unsaturated.

Saturated Fatty Acid NO DOUBLE BONDS between carbons (C)!! (saturated with Hydrogen) Usually solid at room temperature, Most come from animal products. Can you think of some examples?

Unsaturated Fatty Acids Have double bond(s) in the carbon chain and are not full (saturated) with hydrogen. Most unsaturated fats are liquid at room temperature (oils) Usually come from plants Can you think of some examples?

Phospholipids