1. Do Now Put away belongings Bring binder to desk
Take out Homework AND sheet of paper
Homework Check

2. Do Now Worksheet (Unit 1 review)
Please complete the worksheet If you finish, attempt to label more organelles

3. Cell Membrane
WRITE YOUR NAME, Date, Period and answer the following question:
Write down EVERYTHING you know about the cell membrane

4. The structure of the cell membrane
What allows the cell membrane to be semi-permeable?
Up close the cell membrane looks like a Chocolate Chip Cookie

5. The Fluid Mosaic Model
The name for this structure is the Fluid Mosaic Model
fluid (movement of materials) mosaic (arrangement of items)
Because It is made up of pieces that can move

6. Major Components of the Cell Membrane
Lipids (Fats)
Hydrophilic Head
LOVES WATER
Hydrophobic tail
SCARED OF WATER

7. Major Components of a Cell Membrane
Proteins
Used as:
Receptor Molecules- Bind to neurotransmitters or hormones and signal other parts of the cell
Transport Proteins- Move molecules in or out of cells. Gates

8. Selectively Permeable Membrane
What molecules can get through the phospholipid bilayer???? Can Get in Cannot Get in O2 and C02-Diffuse over membrane Starch- too big Water-facilitated Diffusion and Osmosis Proteins- too big Glucose- allowed by channels Salts-diffuses in water, cannot get Amino acids- has specific channel through hydrophobic membrane