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Transcript of Lipids
made from two kinds of molecules, glycerol and three fatty acids joined by dehydration synthesis.
many plants have a wax covering on their stems to lock in moisture.
some animals have wax-coated fur to repel water.
earwax is to help keep foreign diseases out of the ear canal.
Lipids are assembled from a molecule of glycerol that is attached to one, two, or three fatty acids
All lipids are made up of these elements
All lipids are hydrophobic
Foods That Contain Lipids
and Maxwell Nichols
most important class of lipids
contains cholesterol, sex hormones, and cortisone.
comprised of an ester of a long-chain of alcohol and a fatty acid.
do not contain fatty acids
composed of two fatty acids, a glycerol unit, a polar molecule, and a phosphate group
fatty acid tail is
phosphate and polar head region of the molecule is
major component of cell membrane
encloses cytoplasm and other cell contents
fats are composed of three glycerol and fatty acids
solid or liquid at room temperature
insulates the body
cushions and protects organs
Attracted to water
Repelled by water
Lipids are in you
How They Are Used
Extra calories consumed in your day are stored as lipids in adipose cells
Insulates and protects the body
Your body relies on their storage to provide energy during exercise
Builds and maintains cell membranes
Helps fat soluble vitamins absorb into the body
How do Our Bodies Make Them?
When our bodies decide they need to store energy from food intake
It keeps molecules in place so they do not diffuse by maintaining cell wall
Provide a main energy source to the human body
Lipids yield 9 k/cal of energy per gram
Metabolism occurs when a cell is being formed