Aim# 13: Active vs. Passive Transport

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Presentation transcript:

Aim# 13: Active vs. Passive Transport

1. How does the smell of baked cookies spread throughout a house?

2. Passive vs. Active Transport: Passive Transport - no cellular energy required to occur - goes with the concentration gradient - diffusion - facilitated diffusion - osmosis Active Transport - requires cellular energy to occur - goes against the concentration gradient - Endocytosis/Exocytosis - Sodium Potassium Pump

3. a. Concentration: b. Concentration gradient:

4. Diffusion: Passive Transport

5. Dynamic Equilibrium: Dynamic Equilibrium

6. Factors affecting diffusion: Concentration Temperature Pressure Think about the membrane's selective permeability for a moment. What other factors might affect the rate of diffusion?

7. Facilitated Diffusion: Facilitated Diffusion Passive Transport

8. Osmosis: Passive Transport

9. Solutions: Isotonic: Hypotonic: Hypertonic:

8. On the inside of a cell, it is 75% water and 25% salt. On the outside of the cell it is 60% water, 40% salt. a.Will water move into or out of the cell? b.Will the cell shrink or swell? c.Is the solution outside of the cell hyper or hypotonic? 9. On the inside of a cell, it is 30% water and 70% sugar. On the outside of the cell it is 90% water, 10% sugar. a.Will water move into or out of the cell? b.Will the cell shrink or swell? c.Is the solution outside of the cell hyper or hypotonic?

1. Y or N: Is water able to diffuse through a cell’s selective permeable membrane? 2. Y or N: Are solutes (particles) always able to diffuse through a cell’s selective permeable membrane? 3. What is the determining factor that will or will not allow solute (particle) diffusion? _______________

10. Active Transport: Why does active transport require energy? Active Transport

~ How is facilitated diffusion different from active transport? ~ Why is cell transport so important to cells?

11. ATP:

12. Na+/K+ ATPase Pump: - sodium-potassium pump

13. Coupled transport: -"Piggyback"

14. Endocytosis:

15. Exocytosis: Active Transport animations

Membrane and Transport Review Na+/K Pump, Endocytosis, Exocytosis