Lipids.

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Presentation transcript:

Lipids

Learning Objectives Define the following terms: lipid, fatty acid, glycerol, hydrophobic, saturated, and unsaturated Compare and contrast saturated and unsaturated fatty acids

Examples of Lipids Fats Oils Waxes Phospholipids Steroids Vitamins

Characteristics of Lipids Non–polar and generally insoluble in polar substances Hydrophobic – “fear” water

Monomer of Lipids Lipid molecules are made up of 3 fatty acids and glycerol

Saturated vs Unsaturated Fatty Acids Saturated - Carbons contain the maximum # of hydrogen atoms Unsaturated - At least one carbon-carbon double bond

Functions of Lipids Long-term energy storage - fats and oils Protection and insulation - fats Water-proofing - waxes Body function and control - hormones and cholesterol Structural - phospholipids, a major component of the cell plasma membrane

Why do elephant seals have so much fat?

End of Lipids

Polyunsaturated Fatty Acid Lipids whose fatty acid chains contain more than one double bond.