1. The Plasma Membrane
7.2

2. Function of the plasma or cell membrane
The key property of the cell/plasma membrane is selective permeability.
Selective permeability- the ability of a membrane to allow some substances to pass through while keeping others out.

3. Structure of the plasma membrane
The plasma/cell membrane is composed of a phospholipid bilayer.
The phospholipid bilayer is composed of phospholipids (fatty tails with phosphate heads).

4. Structure of the plasma membrane
Hydro- meaning water
Phobic- scared of
Philic- in love with

5. Structure of the Plasma/Cell membrane
The fluid mosaic model shows all of the molecules that can be embedded in the cell membrane.

6. Structure of the Plasma/Cell membrane
Transport proteins- a protein that is embedded in the plasma membrane to help large or nonpolar molecules pass in and out of the cell.
This type of transport doesn’t use energy.

7. Key points for 7.2
The cell or plasma membrane is selectively permeable, meaning it only lets some things in and out.
The cell membrane is composed of phospholipids