lipids 2 Flashcards
why are phospholipids important ?
important constituents of all biological membranes
what are the 4 things phospholipids constructed from?
-fatty acids (hydrophillic)
-a platform to which the fatty acids are attached (hydrophillic)
-a phophsate group (hydrophilic)
-(usually) an alcohol attached to the phosphate group (hydrophillic)
how is a phoslipid formed?
reaction between a glycerol molecule and fatty acids
what reactions forms a phoslipid?
esterfication
how are phoslipids amphiathic?
The combination of 2 long hydrophobic “tails” and the hydrophilic
“head”
where is lecithin extracted from?
egg yolks and soy beans
how are Sphingolipids different from phoslipids and TAGS
contain fatty acid(s) bound to sphingosine (rather than glycerol)
what is the back bone structure in Sphingolipids
sphingosine
describe sphingosine
amino alcohol that contains a long, unsaturated hydrocarbon chain
what is different about sphingomylein
the only phospholipid found in membranes that is not derived from glycerol
what is sphingomyelin a major consistunet off?
myelin
glycolipids are lipids that contain..
one or more sugars
in animals where glycolipids derived from>
sphingosine (sphingolipids)
why are Prostaglandins important?
important signaling molecules that play a crucial role in various physiological processes in the body.
what are the roles of Prostaglandins
-stimulate inflammation
-stimulate smooth muscle contraction
-regulate blood flow to particular organs
