1. Day 27 Agenda: Turn in Project The cell membrane notes
Khan academy video: cell membrane intro.

2. Bell Ringer Day 27 Number 1-8 and then label the organelles.
Cytoplasm Cell Wall Vacuole Endoplasmic Reticulum (ER)
Nucleus Mitochondria Cell Membrane Chloroplast 1 2 3 5 7 6 8 4
Image:

3. Endoplasmic Reticulum (ER)
The answers are …
Vacuole 1 2 3 5 7 6 8
Cytoplasm
Chloroplast
Mitochondria
Nucleus
Cell Wall 4
Endoplasmic Reticulum (ER)
Cell Membrane

4. The Key to Cellular Transport
The Cell Membrane
The Key to Cellular Transport

5. Red plasma membrane stain

6. Eukaryotic Cell?

7. Eukaryotic Cell - Plant

8. Blue Stain. Cell Type?

9. Brown Stain. Cell Type?

10. Cell (or Plasma) Membrane
All cells have a plasma membrane that surrounds the cell and protects/separates the cell from the environment

11. Characteristics of the Cell Membrane
Made of a phospholipid bilayer
Selectively permeable
-it controls “selects” what can enter or leave the cell
-allows nutrients in, wastes out to maintain HOMEOSTASIS
Fluid Mosaic Model
- made of different molecules – phospholipids, proteins,
cholesterol
- the molecules can move “fluid”

12. Lipid bi-layer – the heart of the membrane

13. Sketch the cell membrane

14. Phospholipids: Phosphate Heads
hydrophillic head– loves water and charged particles

15. Phospholipids: Lipid Tails
hydrophobic – fear water and charged particles

16. Specialized Proteins Cell recognition Signaling
Channels to let substances in and out
Pumps to move substances in and out
Proteins

17. Receptor Proteins
recognize and bind with substances outside of the cell,
causing changes inside the cell

18. Enzymes
Allow reactions to occur- light reactions and ETS occur with enzymes in membrane

19. Transport Proteins
Proteins that extend across the membrane – provide a way for large or charged molecules to cross the membrane