Ch 23- Lipids Flashcards
(30 cards)
Waxes
Carboxylate acid esters with long chains
Triacylglycerols
Carboxylic acid trimesters of glycerol
3 carbon trial alcohol
Glycerophospholipds
Triesters of glycerol contain charged phosphate-diester groups
Sphingomyelins
Amides derived from an amino alcohol (Sphingosine) contain charged phosphate-diester groups
Phosphate ester group at C1
Glycolipids
Amides come from Sphingosine contain polar carbohydrate groups
Sterols
Four-ring steroid nucleus structure
Eisanoids
Carboxylate acids that are special type of intercellular chemical messenger
Wax
Mixture of fatty acid long chain alcohol esters
Properties of Triacylglycerols in Natural fats and Oils
Non polar and hydrophobic
No ionic charges
Solid fats have high portion of saturated fatty acid chains
Liquid fats have high portion of unsaturated fatty acid chains
Degree of unsaturation
Number of carbon carbon double bonds in a molecule
Cell membrane lipids in animals
Phospholipids
Glycolipids
Cholesterol
Phospholipids
Ester phosphate link
Built from glycerol (to give Glycerophospholipds)
Or an alcohol Sphingosine (to give Sphingomyelins)
Glycolipids
Lipid with fatty acid bonded to C2-NH2 group and sugar bonded to the C1-OH group of Sphingosine
Sphingolipid
Lipid from amino alcohol Sphingosine
Lipids
Are amides or esters of carboxylate acids with long unbranched chains
Liposomes
Small spherical vesicles with a lipid bilateral surround aqueous center
Bile acids
Essential for the emulsification of fats during digestion
Arachidonic acid
Immediate precursor to prostaglandins and leukotrienes
Eicosanoids
Derived from 20 carbon unsaturated fatty acids
Synthesized throughout the body
Sterols
Contain cholesterol
Bile acids and salts
Sex hormones
Testosterone
Make sex hormone (androgen)
Estradiol
Female sex hormone (estrogens)
Simple diffusion
Non polar
No charge
Small
Facilitated diffusion
Polar
H2O and Na +
Glucose
Protein help pump
