1. Cellular Transportation

2. CELL MEMBRANE – (plasma membrane)
Made of lipids and proteins
Helps to maintain homeostasis
Around ALL cells
FLUID MOSAIC MODEL
Selectively Permeable - membranes that allow some things through
water
Oxygen
Carbon Dioxide

3. 2 types of Cellular Transport
1. Passive Transport
Diffusion
Osmosis
2. Active Transport

4. 1. Passive Transport
Movement through a membrane which requires NO energy.
Examples:
Osmosis
Diffusion

5. A. DIFFUSION
Diffusion- movement of particles from an area of high concentration to low concentration
Equilibrium – When particles are evenly distributed over a given space.
Concentration Gradient- difference between concentrations in a space

6. B. Osmosis
Osmosis- the passage of water from a region of high water concentration through a semi- permeable membrane to a region of low water concentration
Important in maintaining homeostasis within the cells
Low salt concentration High salt concentration

7. 2. Active Transport
Movement of molecules across a membrane AGAINST the concentration gradient.
Carrier protein- transport protein that binds with a particle and helps it across the membrane

8. Needs for Active / Passive Transport
Intake of vital nutrients
Rid the cells of CO2
Active Transport
Ridding the cells of toxins
Bringing in large molecules (nutrients) that the cell needs for metabolism