Lipids

lipids

Are asters of along chine fatty acid they are called Fats or Oils depending on weather ,also they are solid or liquids at room temperature and consist from saturated and unsaturated fatty acid.
Lipids constitute a heterogeneous group of
compounds of biochemical importance. Lipids may
be defined as compounds which are relatively
insoluble in water, but freely soluble in nonpolar
organic solvents like benzene, chloroform, ether, hot
alcohol, acetone, etc.
also lipids consisted from reaction of glycerol with fatty acid to give triglyceride:-

Glycerol + 3Fatty acid Triglyceride + H2O

FUNCTIONS OF LIPIDS:-

1. Storage form of energy (triglycerides)
2. Structural components of biomembranes
(phospholipids and cholesterol)
3. Metabolic regulators (steroid hormones and
prostaglandins)
4. Act as surfactants, detergents and emulsifying
agents (amphipathic lipids)
5. Act as electric insulators in neurons
6. Provide insulation against changes in external
temperature (subcutaneous fat)
7. Give shape and contour to the body
8. Protect internal organs by providing a
cushioning effect (pads of fat)
9. Help in absorption of fat soluble vitamins (A, D,
E and K)
10. Improve taste and palatability to food.