Biology Cornell Notes :D
If
QUESTIONS cell membrane forms boundary between cell and the outside enviorment
describe the and controls the passage of materials made of double phospholipid layer
structure of phospholipid glycerol two fatty acidchains charged phosphate group
a phospholipidphospholipid head is polar and likes water tails are opposite
and where is cholesterol molecules strengthen the cell membrane
polar non fluid mosaic model describes the molecules arrangement in membrane
polar the membrane is flexible and can move around
selective permeability alows some but not all materials to cross
compaire andselective permeability allows homeostasis within the cell
contrast some molecules cross by expending energy and others not
intracellvar how molecules cross depend on size polarity and concentration
receptors and receptors a protein that detects a molecule and responds with action
membrane intracellvar within or inside of a cell
intracellvar are nonpolar and small usually hormonesto
molecules that cant cross bind to a receptor in the membrane
hypothesize
what would outside
8g
INSIDE outside
8 inside outside
8 INSIDE
happen if 0 0 on a ao o
any molecule
É8É'D GEEcould pass 0
through the
É receptory
9
selectivepermeable
ÉÉf or
intracellvar receptors
cancrossthemembrane
membrane receptorsbind
boundbymoleculesthat to molecules that cant
enterwhenboundthe
n n
receptor transmitsthe
signalinside changing
summary statement things I learned are that the cell membrane is made of a bilayer
of phospholipids a phospholipid head is polar and the tail is nonpolar and the 3
ways materials pass through the membrane things I found interesting are that receptors
are very complex smart at dealing with molecules and without the membrane there
would be no cell one question I still have is are there other ways for molecules to
passthrough the membrane