Monday 10/19/2015
Agenda: Notes on Diffusion
Activity: Cell Membrane Foldable
Activity: Cellular Membrane and Molecular Movement due Monday 9/15/2014
for 25 Points
Homework: Finish Cell Membrane and Molecular Movement Worksheet
Important Dates
Wednesday/Thursday 10/28-10/29/2015: Membrane and Molecular Transport
Exam
Friday 10/30/2015: Lab Report due for Grape Lab
Other Stuff in the Cell Membrane!
• The cell membrane has a lot of stuff in it besides
phospholipids. Some other stuff in the cell membrane are
PROTEIN CHANNELS, RECEPTOR MOLECULES, AND
CHOLESTEROL.
Cell Membrane Foldable
 Draw and label picture of the
cell membrane
 Make sure to add color and label
all parts of the cell membrane
(Top Inside Flap of foldable)
 List the functions of the cell
membrane
 Use the vocabulary you learned
from today’s notes (Bottom Inside
Flap)
 Related Terms for Cell
Membrane
 What are other terms used to
describe the cell membrane?
(Bottom Inside Flap)
Other Stuff in the Cell Membrane!
• What that looks like:
Receptor molecule
Protein channel
Cholesterol
Protein Channels
• Protein channels let molecules that can’t get through
the cell membrane into the cell. We will talk about
this more soon.
Receptor Molecules
• Receptor molecules receive signals from the rest of
the body. We will talk about this more when we talk
about hormones.
Cholesterol
• Cholesterol strengthens the cell membrane so that a
cell can keep its shape!
DIFFUSION
Think about it…: What would happen if someone
farted in one corner of the room?!!!
Passive Transport
Requires NO energy
Particle go from high to low concentration
Three types of passive transport:
1.Diffusion
2.Facilitated Diffusion
3.Osmosis
What is Diffusion?
Diffusion is the movement of any substance from a
higher concentration to a lower concentration until a
balance is reached
Examples:
Spraying perfume in a room
Food coloring in water
http://www.youtube.com/watch?v=STLAJH7_zkY
Diffusion Across a Membrane
Molecules will diffuse through a membrane until
there is an equal amount on both sides.
(Equilibrium)
What Happens Next?
After equilibrium has been reached, the molecules
keep moving, but the balance remains the same.
Selectively Permeable Membrane
Molecules that are too big, can’t get through
Facilitated Diffusion
• If a molecule is too big to get across the cell
membrane, it can get inside the cell by going through
a protein channel.
• http://highered.mcgrawhill.com/sites/0072495855/student_view0/chapter2/
animation__how_facilitated_diffusion_works.html
END for 9/12 & 9/13
Tuesday 10/20/2015
Agenda: Osmosis
Activity: Osmosis Reading Activity
Homework: Annotation of Osmosis Reading and Mind Map due
Wednesday/Thursday 10/21-10/22/2015 for 30 Points
Important Dates
Wednesday/Thursday 10/28-10/29/2015: Membrane and Molecular Transport
Exam
Friday 10/30/2015: Lab Report due for Grape Lab
Q1 WK8
Wednesday/Thursday 10/19-10/20/2015
Agenda: Osmosis
Activity: Osmosis Lab and Rough Draft Write-Up
Homework: Finish Typed Lab Report (Due Friday 10/30/2015)
Important Dates
Wednesday/Thursday 10/28-10/29/2015: Membrane and Molecular Transport
Exam
Friday 10/30/2015: Lab Report due for Grape Lab
Osmosis Grape: ROUGH DRAFT
Everyone will write up an osmosis grape rough draft.
You have the rest of the class period to write up your rough
draft.
The final draft of your lab report should be typed and is due
next Friday, 10/30/2015
Q1 WK8
Friday 10/23/2015
Agenda: Osmosis
Activity: Osmosis Lab and Rough Draft Write-Up
Homework: Beaker Worksheet and notes due Monday 10/26/2015
for 20 Points
Important Dates!
Tuesday 9/23/2014:
1. Grape Lab Report Due
2. Cells Study Guide Due