Lipids
Lipids are fatty compounds that perform a variety of functions in your body. They're part of your cell membranes and help control what goes in and out of your cells.
structure of lipids
CH3(CH2)nCOOH
Function
- lipids are important in the body for energy storage
- lipids are also important for the cell membrane
- contains twice the amount of energy found in carbohydrates
Additional information
- in a body that weighs 150 pounds, 22 of those pounds will be lipids
- this is often why humans can live several days without food
- can also go several days without water
- lipids are a chemically diverse group of compounds
2 fatty acids = non polar = hydrophobic
The fatty acid chain of lipids can come in two forms; saturated and unsaturated. Saturated fatty acid chains contain only single bonds between the carbons. Unsaturated fatty acids contain a double bond between two carbons in the chain. Unsaturated fatty acids contain either cis or trans double bonds.
Polyunsaturated fats are considered healthy fats, as they may reduce your risk of heart disease
They are important in the diet as energy sources and as sources of essential fatty acids and fat-soluble vitamins, which tend to associate with fats.
0.5-1g/kg of fat should be consumed per day to avoid essential fatty acid deficiency.
why we shouldn't eat fatty acids
Eating too much saturated fats in your diet can raise "bad" LDL cholesterol in your blood, which can increase the risk of heart disease and stroke. "Good" HDL cholesterol has a positive effect by taking cholesterol from parts of the body where there's too much of it to the liver, where it's disposed of
Lab
We did an experiment in the lab about which substances had the most amount of lipids, the substances were, milk, soda, water, and oil. we added the ethanol into each tube to see which one had the most lipids. the substances would form a layer on top, after some time we noticed that oil had the most amount of lipids.
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