2. Passive and Active Transport
The Cell Membrane is semipermeable
Semi: partly or Somewhat.
Permeable: Substances can get through.
Some substances can get through the Cell Membrane because it is semipermeable.

3. Passive Transport
Passive Transport: Transport of substances into or out of the cell without the use of energy.

4. Passive Transport
Diffusion: When a substance moves from an area of high concentration to an area of low concentration.
High Concentration
Low Concentration
Diffusion

5. Passive Transport
Equilibrium: Occurs when the high concentrated substance is equally distributed into the low concentration substance.
Equilibrium
What will happen when equilibrium occurs with the Mio and the water?

6. Passive Transport
Osmosis: the diffusion of water through the cell membrane.
Water goes from where there is a lot of water to where there is a little bit of water.
If there is a lot of water outside of the cell and very little inside, then the water goes from where to where?
If there is a little water outside of the cell and a lot inside, then the water goes from where to where?

7. Passive Transport
Facilitated Diffusion: when a substance is brought into the cell by transport proteins in the cell membrane.

8. Active Transport
Active Transport: when the cell must use energy to get a substance into or out of the cell.
Why is this person using energy to get more clothes into the suitcase?

9. Active Transport
Cells must use energy when moving substances against the concentration gradient, or from an area of low concentration to an area of high concentration.

10. Active Transport
Cells use transport proteins for active transport, much like facilitated diffusion.
What is the difference between active transport and facilitated diffusion?

11. Active Transport
Sometimes the cell uses the cell membrane to get substances into or out of the cell.

12. Active Transport
When the cell membrane moves a substance into the cell, it is called endocytosis.

13. Active Transport
When the cell membrane is used to transport substances out of the cell, it is called exocytosis.

14. Ticket out the Door
Define these three terms: High concentration, low concentration, and diffusion.
What are the two forms of active transport that involve the cell membrane?
What is one word that describes the cell membrane?