1.3 membrane structure Flashcards
what are glycoproteins made of
they are proteins with a few sugar chains attached
why are glycoproteins important
they act as hormone receptors and are important for cell recognition by the immune system
transport
protein channels and protein pumps
receptors
peptide-based hormones
anchorage
cells attached to surfaces
cell recognition
MHC proteins and antigens
intercellular joinings
tight junctions and plasmodesmata, cell adhesion between eachother
enzymatic activity
metabollic pathways
what group does cholesterol belong in
steroid
what is the effect of cholesterol in the cell membrane
it regulates the fluidity and flexibility of the cell membrane; packs phospholipids more tightly, and affects permeability
what is cholesterol made of
a hydroxyl group attached to the end, 4 hydrocarbon rings for the body and hydrocarbon tail
peptide based hormones
hormones made of small chains of amino acids
MHC proteins
group of genes that code for proteins found on the surfaces of cells that help the immune system recognize foreign substances
