1. The Plasma Membrane

2. What is it? Different names:
Plasma Membrane
Cell Membrane
Lipid Bilayer
Semi-permeable Membrane
All of these mean the same part of the cell.
It has many important functions.

3. What it Looks Like Phospholipid bodies Hydrophilic Head
Hydrophobic tails.

4. Functions Protection Sets up the cell boundaries. Signaling
Keeps some out and some in.
Sets up the cell boundaries.
Signaling
Two types of transport
Active
Passive

5. Protection What you think it is. Prevent the bacteria and viruses.
Semi-permeable
Only allows certain amounts to come in.
Also, maintains homeostasis.

6. Cell Boundaries Like your projects said.
This is the limit of the cell.
Keeps the organelles covered.
Helps keep pH stable.

7. Signaling Membrane has proteins This also is for cell communication
These can tell the cell is dying
This also get what cell needs.
This also is for cell communication
Proteins will link and cells can talk
Signals get passed along.

8. Types of Transport Active vs. Passive Passive Active
Active requires energy
Passive does not.
Passive
Diffusion
Osmosis
Active
Require ATP
Can be joint transport.

9. Diffusion Just goes in and out without any assistance
Does not need a protein to help.
No energy.
Like the door when it is open.

10. Osmosis This is diffusion of water. Only water can do this.
It can pass through the membrane without working
Salt water vs. fresh water in a beaker.

11. Active Transport ATP can cause the membrane to switch.
The protein will change between open to the outside to open on the inside.
Can be done with multiple types as well.
Ca- K+ ion pump
Can be a switching pump.
Opens to the inside and then the outside.