Cell membranex:
06.12.25
What are cell membranes? - Barrier surrounding
a call or within a cell
a cell mambrane contains phospholipid bilayer,
cholesterol, proteins, Compounds) *2 main types
ay cell mambraves are cell-surgaee mambranes
and membranes avound orgavdlles.
1Cell surgace membranes/ plasma membrane:
barriers betiveen cytoplasm and external
environments. -contrals what substances enter
and exit the cell
2- membranes arround organdlles:
, -seperates organelles from cyto plasm
-divides cell unto different compaitments
Eluid-mosair model:
1 Phospholipid bilayer - makes the membrane
pastially permealle
-hydrophillic heads face the water in the
cyloplasm and the water in extracellular Space
-heydrophobic core in the centre allows only lipid
eduble substames to pars through not water
solubles
-help stabilise membrane at dipperent
temperatures (+fluididy)
06.12.25
What are cell membranes? - Barrier surrounding
a call or within a cell
a cell mambrane contains phospholipid bilayer,
cholesterol, proteins, Compounds) *2 main types
ay cell mambraves are cell-surgaee mambranes
and membranes avound orgavdlles.
1Cell surgace membranes/ plasma membrane:
barriers betiveen cytoplasm and external
environments. -contrals what substances enter
and exit the cell
2- membranes arround organdlles:
, -seperates organelles from cyto plasm
-divides cell unto different compaitments
Eluid-mosair model:
1 Phospholipid bilayer - makes the membrane
pastially permealle
-hydrophillic heads face the water in the
cyloplasm and the water in extracellular Space
-heydrophobic core in the centre allows only lipid
eduble substames to pars through not water
solubles
-help stabilise membrane at dipperent
temperatures (+fluididy)
