Notes 2-28-08 - Notes Chapter 5 Lipids Demonstration oil...

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Notes 2-28-08 Chapter 5 Lipids Demonstration: oil does not mix with water. Lipids are a group of organic compound, most of which do not dissolve in water. Lipids in the diet and in the human body include: fatty acids , glycerides , phospholipids , sterols (ex. Cholesterol). Functions of Lipids: In the body: o Chief form of stored energy (can store a LOT of calories) o Emergency fuel supply (most cells metabolize glucose; in an emergency, would metabolize lipids) o Protect internal organs o Insulation o Cell membrane component o Used to synthesize hormones and other compounds (such as those that trigger your period) In foods: o Source of essential fatty acids o Carrier for fat-soluble vitamins (4 different vitamins) o Sensory qualities o Provide satiety o Provides 9 kcals/ gram o Slows the rate of digestion o Contributes mouth feel Fatty acids are the most abundant lipids. Fatty acids are: o Made up of chains of carbon atoms with attached hydrogen atoms o A carboxylic acid group at 1 end (-COOH) o A methyl group (CH3) at the opposite end. o
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This note was uploaded on 04/07/2008 for the course PSYCH 100 taught by Professor Cave during the Spring '08 term at UMass (Amherst).

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Notes 2-28-08 - Notes Chapter 5 Lipids Demonstration oil...

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