Presentation on theme: "When you think of the word FAT what do you think of ?"— Presentation transcript:
1 When you think of the word FAT what do you think of ? Opening Questions:When you think of the word FAT what do you think of ?What happens to water on a duck’s back?Why?
2 Opening Question Answers 2. Water rolls of their backs….
3 3. The reason is that they have glands filled with oil on their tails… As they clean themselves oil is transferred to their feathers
4 What do we know about oil and water? They DO NOT mixSo the oil acts as a repellent or barrier to the water.
5 Learning Outcomes1. Summarize the categories oflipids2. Provide examples of their biological functions
6 A. Lipids 1. All Lipids have 2 characteristics in common: a. They are insoluble in water because they contain nonpolar hydrocarbon chainsb. They have hydrophobic functional groupsWater fearing
7 2. Lipids make up molecules such as: a. Fat ----Bacon, lard and butterb. oils ---corn oil, olive oil….
8 3. Lipids have two primary functions for the body: a. Long term energy use---b. Insulation
9 B. Fats and Oils---Long term energy storage 1. Fats and oils contain two subunit molecules (monomers)a.GLYCEROL---MAIN TYPE1. contains three OH- groups2. These groups are polar3. They are soluble in water
13 C. Formation of Fats and Oils 1. Fats and/or oils form when a carboxyl group of THREE fatty acids reacts with a OH group of a glycerol.2. As a result a fat molecule is made as well as three water molecules.
14 COMPLEX LIPID b. The fat or oil that forms is called a TRIGLYCERIDE: a. when WATER is created during a reaction remember this is called a dehydration synthesis reaction (Condensation Rxn)b. The fat or oil that forms is called a TRIGLYCERIDE:COMPLEX LIPID
24 E. Trans fatsThese are formed when hydrogen molecules are added to fatty acids to make them more saturated. (solid at room temp.)Because of this… trans fats and saturated fats build up as plaque in your blood vessels.
25 3. Plaque causes blood flow to slow and ultimately causes heart disease. 4. Unsaturated fats stay liquid at room temperature so they do not build up in the blood vessels
39 Lipids are used for long term energy and insulation. Types are:FatsOilsWaxesSteroids
40 3. There are two main tyoes of lipids: a. Glycerol b. Fatty Acids 4 3. There are two main tyoes of lipids: a. Glycerol b. Fatty Acids 4. There are three categories of Complex Lipids a. Trigycerides b. Phospholipids c. Waxes 5. The most unique lipids are Steroids