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