1. Cell Transport

2. Materials enter and leave a cell by…
Passive Transport
Diffusion
Osmosis
Active Transport
(requiring Energy)

3. Diffusion EXAMPLE
Molecules move from high concentration to low concentration
Food in and waste out
Selectively Permeable
Allows some stuff in

7. Osmosis EXAMPLE
Special type of diffusion where water passes through the cell membrane
The higher the concentration of dissolved material the less water
Water moves from less salty to more salty

8. Active Transport Example
Transport molecules “carry” the substance into or out of the cell
Examples of substances transported in this way are…
Calcium (Ca)
Potassium (K)
Sodium (Na)

9. Energy Diffusion and Osmosis do not require energy (Passive Transport)
just a difference in concentration
Active Transport requires the cell to use some of its energy reserves