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lipids - Coggle Diagram
lipids
functions of lipids
stores energy
insulation from environment
water repellent
buoyancy and acoustic control
membrane structure
cofactors
signaling molecules
pigments
antioxidants
sterols , cholesterol and steroid
the structure of sterols is almost planar
many steroid hormones are sex hormones
cholesterol can modulate fluidity and permeability of the membrane
plasmalogen
common in vertebrate heart tissue
also found in some protozoa and anaerobic bacteria
function not well understood yet
vitamins
Vit D regulates calcium metabolism
Vit A is crucial for sight
Vit E and K are antioxidants
classification
contain fatty acid
storage lipid
membrane lipid
does not contain fatty acid
cholesterol
pigment
vitamin
phosphatidylcholine
the major component of most eukaryotic cell membrane
many prokaryotes cannot synthesize it
sphingomyelin
abundant in sheath that surrounds nerve cells
lipids are degraded in lysosome
failure to degrade lipids can cause medical disorders
solubility decreases as chain length increases
melting point decreases as chain length decreases
melting point decreases as double bonds increases
double bonds kink the chain
glycosphingolipids determines blood group