Aim# 13: Active vs. Passive Transport

http://programs.northlandcollege.edu/biology/biology1111/animations/passive1.swf

http://www.phschool.com/science/biology_place/biocoach/biomembrane1/structure.html

http://www.teachersdomain.org/asset/tdc02_int_membraneweb/

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. Factorsaffecting 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?  _______________

1 2 3

54

7 98

6

10 11 12

13 14 15

16 17 18

10. ActiveTransport:

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+ATPasePump:

- sodium-potassium pump

13. Coupledtransport:

-"Piggyback"

14. Endocytosis:

15. Exocytosis:

Active Transport animations

Membrane and Transport Review

Na+/K Pump, Endocytosis, Exocytosis