1. Passive Transport
Mrs. Harper
9/29/17
Biology

2. September 29, 2017
Download notes from webpage
Begin working on Do Now

3. Do Now 9/15/15
List at least three factors that affect the performance of an enzyme in a chemical reaction.
What is the function of an enzyme?
Enzymes are an example of which macromolecule?
Define catalyst.
What do enzymes do to the activation energy required by a reaction?
What does it mean when an enzyme denatures?
What do you think the word “passive” means?

4. Today’s Topic: Transport in the Cell

5. Demonstration Video
Make observations and answer the questions as you watch.

6. Passive Transport Does NOT require energy
No energy (ATP) is necessary for movement of molecules
Passive = no energy needed

7. Passive Transport & Concentration Gradient
In passive transport, molecules move from an area of high concentration to an area of low concentration.
HIGH  LOW
Goes with the natural flow

8. Types of Passive Transport
Diffusion
Natural movement of small particles
Facilitated Diffusion
Channel proteins assist with passive transport of larger molecules
Osmosis
Natural movement of water

9. (Simple) Diffusion High to low concentration
Simple diffusion is the natural movement of small particles
High to low concentration
Unassisted, no proteins required
Continues until equilibrium is reached

10. Video Simple Diffusion

11. Facilitated Diffusion
Facilitated diffusion is protein-mediated transport that requires no energy
HIGH  LOW
Uses transport proteins that are very selective
Transports larger/charged molecules

12. Two Transport Proteins in Facilitated Diffusion
Channel Proteins
Less complex
Carrier Proteins
More complex

13. Video Facilitated Diffusion

14. Take 2 min and explain the differences between (simple) diffusion and facilitated diffusion.

15. Osmosis
Osmosis is the passive movement of WATER molecules through the cell membrane

16. Osmosis Video

17. Assignment
Complete the handout independently Make sure you are writing in complete sentences.
Unfinished classwork will become homework
Observe Diffusion in Action
(Place 2 drops of food coloring into a clear cup of water and analyze results)