1. Cell Membrane Job = Selectively permeable Three types of molecules:
Phospholipids
Bi-layer
Cell Membrane
Non-polar tails inside away from water (Hydrophobic)
Polar heads outside (Hydrophilic)
Three types of molecules:
1. Phospholipid bilayer
2. Membrane Proteins
a. Fibrous
b. Transport (pore or channel)
c. Peripheral (glycoprotein or enzyme)
3. Cholesterol

2. Active Transport: Passive Transport: Energy requirements?
Driven by?
Maintains?
Three types:
1. Carrier Proteins
2. Endocytosis
a. Pinocytosis (drink)
b. Phagocytosis (devour)
3. Exocytosis
Passive Transport:
Energy requirements?
Driven by?
Maintains?
Three types:
1. Diffusion
2. Osmosis
3. Facilitated Diffusion

3. Passive Transport: Concentration Gradient …
extracellular
Diffusion: movement of particles:
intracellular

4. Osmosis = movement of water
Concentration of solute in solution outside cell higher, lower, or same then inside cell?
Type of solution outside cell: ______________ meaning __________
Movement of water: Explain:
Does volume of cell change?
70% Water
30% Salt
Cell
H2O B.
80% Water
20% Salt
50% Water
50% Salt
Cell
Concentration of solute in solution outside cell higher, lower, or same then inside cell?
Type of solution outside cell: ______________ meaning __________
Movement of water: Explain:
Does volume of cell change?
H2O C.
Concentration of solute in solution outside cell higher, lower, or same then inside cell?
Type of solution outside cell: ______________ meaning __________
Movement of water: Explain:
Does volume of cell change?
50% Water
50% Salt
90% Water
10% Salt
Cell
H2O

5. Osmosis of a Plant Cell
Turgor Pressure: water pressure in the plant cell that causes the cell membrane to press against the cell wall. It occurs in a hypotonic solution.
Plasmolysis – loss of water from a plant cell, causing pressure to drop in the cell and the cell membrane will shrink It happens in a hypertonic solution.

6. Osmosis and Diffusion
Diffusion:
Egg Osmosis: shows what happens in hyper/hypo solutions:

7. A B Active or Passive Transport???
1. Which way would the particles flow if it was passive transport?
2. Which way would the particles be pumped if it was active transport?
What would the result be if passive transport is used?
What would the result be if active transport is used?

8. Movement of cells
Cilia
Flagella

9. Amoeba with Pseudopod