cell membrane diagram

A

Glycolipid

B

External peripheral protein

C

Carbohydrate chain

D

Hydrophilic heads

E

Hydrophobic tails

F

Phospholipid bilayer

G

Cytoskeleton

H

Internal peripheral protein

I

Cholesterol

J

Integral protein (trasnememebrane)

Phospholipid Bilayer

Form a bilayer → provides selectivity

hydrophobic inside

hydrophilic outside

allows non polar easily

polar molecules do not pass easily.

Cholesterol

increases imperability to polar molecules

provides structure and stability

to much: risk of forming plagues in blood vessels

to little: decrease structure and selectivity and hard to make hormones.

Integral (transmembrane) Proteins

proteins that go through the entire membrane

serve as Channels or Carriers that allow things through

Receptors: pass a message into the cell

Internal Peripheral proteins

bind on the inside of the bilayer

provide support and shape

cell “skeleton”

External peripheral proteins

Bind on the outside of cell

give external ID Markers (me markers)

make blood types

Hydrophobic Tail

area of a phospholipid thats nonpolar and doesnt like water

Hydrophilic Head

area of a phospholipid thats polar and likes water