1. Getting Into and Out of Cells
Cell Transport
Getting Into and Out of Cells

2. Types of Cell Transport
Passive Transport
- no cellular energy required to occur
- goes with the concentration gradient
Active Transport
- requires cellular energy to occur
- goes against the concentration gradient
- Endocytosis/Exocytosis

3. Corner
Move all the students into one corner and explain that they naturally want to have some space and when possible they will want to move to get that space.

4. Concentration Gradient
The concentration gradient is the distribution of particles across space from high to low concentration

5. Passive Transport
Energy for passive transport comes from the molecules themselves
In passive transport, molecules move with the
concentration gradient
- move from high concentration to low concentration

6. Diffusion Primary means of cell transport
- molecules move from high to low concentration
- movement continues with the gradient until
the molecules are evenly distributed
- equilibrium is achieved

7. Facilitated Diffusion
Particles move with the concentration gradient
across a transport protein in the membrane
- ions, sugar and amino acids all move into and
out of cells by facilitated diffusion

8. Osmosis Is the diffusion of water through a membrane .
If the concentration of water is higher outside a cell than inside, water moves into the cell.
If the concentration of water is higher inside of a cell than outside, the water moves out of the cell.

9. Let me in
Have students form into a circle representing the cell wall. Select the smallest students to be on the outside tell them this represents particles that need to move inside the cell representing passive transport. Then use teacher as example of active transport.

10. Active Transport Uses cellular energy/ ATP
Goes against the concentration gradient
- Low concentration to High concentration

11. Endocytosis Endocytosis – taking things into cells
Phagocytosis- cell eating – takes in food
Pinocytosis- cell drinking – takes in liquid
- membrane encircles food or liquid, forming a vacuole
White blood cell engulfing
bacteria (bacillus)

12. Exocytosis Exocytosis-moving materials out of cells
- wastes/ undigestible material
- cellular products like: antibodies, hormones, enzymes and neurotransmitters
-vacuole/vesicle containing the substance travels to the cell membrane where it fuses and releases it contents out of the cell

14. Mini Quiz
Describe diffusion using real world examples, and why it is important to life functions
Describe how passive transport works and how does the cell benefit from this?
Why do plant leaves shrink, and how can this be remedied?
Describe active transport, and why it is important.
What are the differences between endocytosis and exocytosis, and why they are necessary?
How does cell size and shape affect cell transport?