Lipids
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Transcript of Lipids
![Page 1: Lipids](https://reader036.fdocuments.net/reader036/viewer/2022070313/55496cccb4c905d8558b4f8e/html5/thumbnails/1.jpg)
DAVID ADAIR FERNÁNDEZ MORGAN
ASAEL MIGUEL LÓPEZ
OMAR JIMÉNEZ COCA
ISRAEL FERNÁNDEZ DOMÍNGUEZ
Lipids
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WHAT ARE THEY?
•Water insoluble compunds usually composed of an
alcohol and one or more carboxylic acid molecules.
•They include: Animal fats, vegetable oils and waxes.
Fats and oils are esters of glycerol, an alcohol that
contains 3 (OH) Groups.
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Each molecule of a fat or an oil contain three ester groups resulting
from the 3 carboxylic acid molecules joined to one glycerol
molecule.
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FUNCTIONS OF LIPIDS!
•They have two major biochemycal roles in the
body:
•Store excess energy when an organism
porcesses more food than it needs.
•Form membranes surronding cells and
components
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Clasification of lipids
• Lipids are divided in two groups:
Simple lipids Complex lipids
Phospholipids Vegetable oils
Glucolipids Waxes
Esteroids Fats
Cromolipids
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PHOSPHOLIPIDS
• Glyceride found in living cells and cell membranes. They have two fatty acids esterified to glycerol. has an ionic “head” soluble in water, and a “tail” that is insoluble.
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GLUCOLIPIDS
• Components formed by a carbohydrate that can be glucose or galactose, and a fatty acid and an alcohol. Other words lipids that contain D-glucose.
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STEROIDS
• A lipid with a four-ring structure. Include cholesterol, sex hormones, vitamine D and bile salts.
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OILS AND FATS
• Contain fatty acids, fats have small percentage of unsaturated fatty acids, oils contain few saturated fatty acids.
• A liquid lipid obtained from a plant source its called an oil.
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• A semisolid lipid obtained from an animal source is called a fat.
• The distinction of a fat and an oil is based on the saturation of the fatty acids.
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WAXES
•Obtained from heavy crude oil. Its a mixture of a long chain alkanes. A lipid wax is a mixture of naturally ocurring esters of fatty acids and long chains alcohols.
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INTERNET REFERENCES
• http://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/lipids.htm
• http://www.chem4kids.com/files/bio_lipids.html