1. Types of Transport

2. 2 Different Types Passive Active No energy input to move substances
Requires energy to move substances

3. Passive Transport Diffusion
Molecules and ions can move across a membrane down their concentration gradient
High concentration to low concentration
2 types
Simple diffusion
Unassisted (true of fats, oxygen, CO2)
Osmosis: diffusion of water
Facilitated diffusion
Must have a protein to help them cross

4. Passive Transport Filtration Hydrostatic gradient
Pressure moves the substances much like a hole in a water balloon squirts out water

5. Active Transport Solute Pumping Bulk transport
Proteins use ATP to force substances where they need to be
Bulk transport
Into the cell: endocytosis
Out of the cell: exocytosis