Download Cell Membrane Notes

Cell Membrane Notes
Cell ___________________ are composed of 2 ___________________
layers. (bilayer)
The Outer “heads” of the phospholipid really like water and are
called ______________________. The area between the membrane
layers is made of the phospholipid “tails”. Tails are “afraid of water”
and are called: ________________. Draw and label one phospholipid
in the box to the right:
The ___________________ membrane has 2 major
___________________:
1. forms a ___________________ between inside and
___________________ of the cell
2. controls ___________________ of ___________________
The fluid ___________________ model ___________________ the membrane-how? Explain:
There are other ___________________ embedded in the ___________________. Label the
compounds in the membrane below:
Macromolecule
compounds
Protein
Function
Membrane proteins:
Channel proteins:
Membrane receptor proteins:
Intracellular receptor proteins:
Carbohydrate
Lipids/Fats
(________)
Do ______mix with water. Cholesterol:
Phospholipid bilayer:
Use figure 3.18 to draw an example of selectively
permeable or semipermeable membrane in the box to
the left and fill in the blanks: The cell membrane is
___________________ permeable.
Allows ____________, but not ____, _________________to
cross
Go to
http://highered.mheducation.com/sites/0072507470/student_view0/chapter17/animation__i
ntracellular_receptor_model.html After you watch the animation, explain how cell signaling
works using the terms ligand and receptor protein:
1) Why do phospholipids form a
bilayer in the cell membrane?
2) How does a sieve (or a
colander) demonstrate
selective permeability?
3) Based on your knowledge that
membranes are also found
around all organelles, how do
you think organelles came to
be part of the cell?