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Lipids

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Lipids Examples

fatsoilswaxeshormones

steroids sex hormones

testosterone (male)

estrogen (female)

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Lipids

Function: energy storage

Supplies more energy than carbohydrates: 1 g. fat = 9cal 1 g. carb = 4 cal

structure of cell membrane sex hormones cushions organs insulates body

think whale blubber!

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Structure of Fat

not a chain (polymer) = just a “big fat molecule”

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Fats: Produced by dehydration synthesis * Fats are made with 1 Glycerol molecule and 3 Fatty Acid molecules

Glycerol and fatty acids contain…

CARBON, HYDROGEN, and OXYGEN

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FATS-

can be classified as saturated or unsaturated

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Saturated fats Most animal fats-

butter, meat fat solid at room

temperature

Limit the amount in your diet contributes to

heart disease deposits in

arteries

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Unsaturated fats Plant, vegetable, nuts &

cold water fish fats (oils) liquid at room

temperature

Better choice in your diet

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Saturated vs. unsaturatedsaturated unsaturated

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Other lipids in biology Cholesterol

good molecule in cell membranes make hormones from it

including sex hormones but too much cholesterol in blood may

lead to heart disease

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Other lipids in biology Cell membranes are made out of lipids

phospholipids heads are on the outside touching water

“like” water tails are on inside away from water

“scared” of water forms a barrier

between the cell & the outside