3Lipids Function: energy storage structure of cell membrane Supplies more energy than carbohydrates:1 g. fat = 9cal1 g. carb = 4 calstructure of cell membranesex hormonescushions organsinsulates bodythink whale blubber!
4Structure of Fat not a chain (polymer) = just a “big fat molecule”
5Fats: Produced by dehydration synthesis Fats: Produced by dehydration synthesis * Fats are made with 1 Glycerol molecule and 3 Fatty Acid moleculesGlycerol and fatty acids contain…CARBON, HYDROGEN, and OXYGEN
6can be classified as saturated or unsaturated FATS-can be classified as saturated or unsaturated
7Saturated fats Most animal fats- butter, meat fat solid at room temperatureLimit the amount in your dietcontributes to heart diseasedeposits in arteries
8Unsaturated fats Plant, vegetable, nuts & cold water fish fats (oils) liquid at room temperatureBetter choice in your diet
10Other lipids in biology Cholesterolgood molecule in cell membranesmake hormones from itincluding sex hormonesbut too much cholesterol in blood may lead to heart disease
11Other lipids in biology Cell membranes are made out of lipidsphospholipidsheads are on the outside touching water“like” watertails are on inside away from water“scared” of waterforms a barrier between the cell & the outside