1. Cell Transport

2. All cell transportation is done by the cell membrane
Our cells use two types of transportation
Active (requires energy)
Passive (doesn’t require energy)

3. Passive Transport
2 types
Diffusion
Osmosis

4. Diffusion
Movement of particles from a solution of high concentration to a solution of low concentration
Caused by Brownian motion
When particles bump into each other
This transport continues until the two solutions reach equilibrium
Balances substances

5. Facilitated Diffusion
Uses channel proteins
Ion channels
Act as tunnels that allow particles to ‘fall’ into the cytoplasm of the cell
Temperature and concentration gradient change the rate of diffusion
Hotter = better
Large difference = faster

6. Osmosis Special type of diffusion
DEFINITION = diffusion (movement) of water across a selectively permeable membrane
Water will move from a high concentration to a low concentration to reach equilibrium

7. Cell Concentration
How much solute (part dissolved) is in a solvent (liquid dissolving)
Type of concentrations
Hypertonic = solution has less water
Hypotonic = solution has more water
Isotonic = equal on both sides

8. All cell transportation is done by the cell membrane
Our cells use two types of transportation
Active (requires energy)
Passive (doesn’t require energy)

9. Active Transport Uses energy
Particles move from an area of low concentration to an area of high concentration

10. 3 types Carrier Protein Pumps Proteins are in the cell membrane
Energy changes shape of the protein so substances can pass

11. Endocytosis Taking bulky material into the cell
Cell membrane folds in around particle
‘cell eating’ = phagocytosis
‘cell drinking’ = pinocytosis

12. exocytosis Forces material out of the cell
Allows wastes to be released