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encloses the cell, defines the cell boundaries, maintains the essential difference between the cytosol and the extracellular environment
nucleus, endoplasmic recticulum, golgi apparatus, mitochondra, lysosomes, peroxisomes
provides the basic structure of the membrane, serves as a relatively impermeable barrier
have three carbon glycerol backbone, two long chain fatty acids, third carbon attached to phosphate group
built from sphingosine, long acyl chain with an amino group and two hydroxyl groups at one end of the molecule
sugar containing lipids, located on the non-cytosolic monolayer of the lipid bilayer, made from sphingosine, sugars addded in the lumen of golgi, cell recognition process
lipid componets of bilayer
convert extracellular signals into intracellular signals, cytosolic side of the bilayer is negatively charged
activated by extracellular signals to cleave specific phospholipid molecules serving as signal mediators
signals next cell to phagocytose and digest the dead cells, phospholipid translocator is inactivated,
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