Lipids Flashcards
A heterogeneous class of naturally occurring organic compounds classified together on the basis of common solubility properties.
Lipids
Insoluble in water, but soluble in organic solvents including diethyl ether, dichloromethane, and acetone.
Lipids
Lipids include:
• Fatty acids, triacylglycerols (triglycerides),
sphingolipids, phosphoacylglycerols, and glycolipids
• Lipid-soluble vitamins
• Prostaglandins, leukotrienes, and thromboxanes
• Cholesterol, steroid hormones, and bile acids
Primary messengers such as _______deliver signals from one part of the body to another part.
steroid hormones
Secondary messengers such as ___ and ___
mediate the hormonal response.
prostaglandins, thromboxanes
Classification structure
• Simple Lipids (Fats and waxes)
• Complex Lipids
• Steroids
• Prostaglandins, thromboxanes, and leukotrienes
A triester of glycerol with three fatty acids.
• In most triglycerides, two or three different fatty acid
components are present.
Triglyceride
The hydrophobic character of triglycerides is caused by
the long nonpolar hydrocarbon chains of the fatty acid
components.
The ester groups, although polar, are buried within a
nonpolar environment, which
makes triglycerides
insoluble in water.
In triglycerides, all three hydroxyl groups of glycerol are
esterified with fatty acids
Practically all fatty acids are
unbranched carboxylic acids.
They range in size from about .
10 to 20 carbons
They contain an ___ number of carbon atoms.
even
