1. Aim: What is Passive and Active Transport? DO NOW: How would you define someone who is active? ____________________ How would you define someone who is passive? ___________________________

2. There are 2 ways molecules can get in a cell. 1) Passive Transport – This type of transport requires no energy (no ATP). The cell uses the natural process of different concentration and molecule size to help molecules move from one area to another.

3. How to Remember Passive Transport Greater Concentration Lesser Concentration Examples: Diffusion Osmosis Energy (ATP)

4. 2) Active Transport – This type of transport requires energy (ATP) to move molecules across the membrane. Some molecules must go against the concentration grain, therefore they rely on protein “pumps”. To get them across. There are 2 ways molecules can get in a cell. (cont)

5. Active transport that requires energy. Movement molecules from low concentration to high. Greater Concentration Lesser Concentration Need Energy (ATP) How to Remember Active Transport

6. Phagocytosis- Movement of large material into the cell. Cell “pinches” the membrane forming a “bubble” around the large material. Other Type of Active Transport

7. Why is Cellular Transport Important? Cells need materials in order to carry out the 8 life functions Cells need O 2 and glucose to perform respiration Cells need to get rid of waste products (CO 2 & excess water) Cells need to grow and repair itself Cells need molecules to break apart and recombine to make new molecules. Without cellular transport, cells could not do what they do.

8. Type of cellular Transport Energy / No Energy High to low Low to high Special circumstances DiffusionNo energyHigh to lowSmall molecules OsmosisNo energyHigh to lowwater Passive Transport No energyHigh to lowDiffusion/ osmosis Active TransportEnergy (ATP)Low to highLarge molecules / cell doesn’t want PhagocytosisEnergyLarge particleCell engulfs large particles

9. Red Onion in tap water

10. Red Onion in distilled water starting to rehydrate

11. Red Onion eventually goes back