1. Moving Cellular Materials

2. Cell Membranes Selectively permeable
Allow only some things to enter and leave.

3. Passive Transport
Movement of material through the membrane without using energy.

4. Types of Passive Transport
Diffusion
Random movement of particles from areas of more to areas of less.
Equilibrium – equal particles in each area.

5. Types of Passive Transport
Osmosis
The diffusion of water through the cell membrane.
Example: Plants

7. Types of Passive Transport
Facilitated Diffusion
Movement of materials through a transport protein located in the membrane.

8. Active Transport
Moving materials through a cell membrane with the use of energy.
Requires transport proteins.

9. Movement of Very Large Particles
Endocytosis
Cell membrane surrounds the particle.
Section of the membrane pinches off to form a vesicle.

11. Movement of Very Large Particles
Exocytosis
Opposite process as endocytosis.
Contents of the vesicle are released outside the membrane.