1. Types of Transport Review

2. The movement of particles against the direction of diffusion.
ACTIVE TRANSPORT

3. The movement of particles from high to low concentration.
DIFFUSION

4. The diffusion of water across a cell membrane.
OSMOSIS

5. The movement of a substance from high to low concentration without energy.
PASSIVE TRANSPORT

6. Type of membrane that allows ALL substances to pass through it.
PERMEABLE

7. Type of membrane that allows only SOME substances to pass through it.
SEMI-PERMEABLE
(selectively)

8. A type of membrane that allows NO substances to pass through it.
IMPERMEABLE

9. How does a water molecule enter and exit a cell?
OSMOSIS

10. How does a sugar molecule enter and exit a cell?
ACTIVE TRANSPORT

11. Can you identify two differences between active and passive transport?
TYPE OF SUBSTANCES
CONCENTRATION GRADIENT
ENERGY – YES or NO?

12. PASSIVE TRANSPORT DIFFUSION OSMOSIS
Can you identify the methods of transport that do NOT require energy by the cell?
PASSIVE TRANSPORT
DIFFUSION
OSMOSIS

13. What factors can control the rate of diffusion?
TYPE OF MEMBRANE
CONCENTRATION GRADIENT
SIZE OF SUBSTANCE
TEMPERATURE
ACTIVITY LEVEL

14. In what direction do substances naturally travel?
HIGH TO LOW CONCENTRATION

15. What cell structure controls diffusion and osmosis?
CELL MEMBRANE

16. Your life depends on . . .
Active Transport!