1. Today’s Data Here
Objective Here!

2. Brainteaser
What word in the English language is always spelled incorrectly?

3. A potato slice is placed in distilled water in beaker 1
A potato slice is placed in distilled water in beaker 1. A similar potato slice is placed in salt water in beaker 2. Which statement correctly explains the movement of water across cell membranes in one of the potato slices?
Water will move out of the potato cells in beaker 1 because the solution is more concentrated.
Water will move into the potato cells in beaker 1 because the solution is more concentrated.
Water will move out of the potato cells in beaker 2 because the solution is more concentrated.
Water will move into the potato cells in beaker 2 because the solution is more concentrated.

4. Let’s Review What is Osmosis?
What are the 3 types of solutions associated with osmosis?
What are the following solutions and which way will the water move?
25% NaCl
25% NaCl
5% NaCl
35% NaCl

5. Cellular Transport Diffusion

6. Today you will learn Explain Diffusion
Explain what is meant by Facilitated Diffusion

7. Passive Transport: 2. Diffusion
Diffusion: random movement of particles from an area of high concentration to an area of low concentration.
(High to Low)
Diffusion continues until all molecules are evenly spaced (equilibrium is reached)-Note: molecules will still move around but stay spread out.

8. Facilitated diffusion (Channel Protein) Diffusion (Lipid Bilayer)
Passive Transport: 3. Facilitated Diffusion A B
3. Facilitated diffusion: diffusion of specific particles through transport proteins found in the membrane
Transport Proteins are specific – they “select” only certain molecules to cross the membrane
Transports larger or charged molecules
Facilitated diffusion (Channel Protein)
Diffusion (Lipid Bilayer)
Carrier Protein

9. Passive Transport: 2. Facilitated Diffusion
Glucose
molecules
Cellular Transport From a-
High
High Concentration
Channel Proteins animations
Cell Membrane
Low Concentration
Protein
channel
Low
Transport Protein
Through a 

10. How well did you do today?
Molecules move from areas of high
concentration to areas of low concentration
through the process of:
osmosis.
diffusion.
passive transport.
active transport.