1. Moves up concentration gradient (from low to high)
5.2 Active Transport pp
Active Transport = movement across the membrane that requires energy (action)
Moves up concentration gradient (from low to high)
Cell has to use energy to do this work
Done by proteins in membrane
How does Active Transport compare to Passive Transport

2. Sodium-Potassium pump 3 Na+ ions from inside cell bind to protein
5.2 Active Transport pp
Sodium-Potassium pump
3 Na+ ions from inside cell bind to protein
Phosphorous from ATP gives protein energy to change shape
Na+ ions released
2 K+ ions from outside cell bind to protein
Protein changes shape
K+ ions released into cell

3. 5.1 Passive Transport pp

4. Membrane-wrap to pass membrane:
5.2 Active Transport pp
Membrane-wrap to pass membrane:
Endocytosis = moving materials into the cell (into cell)
Exocytosis = moving materials out of cell (exit cell)

5. Material contacts membrane Membrane forms around material
5.2 Active Transport pp
Endocytosis:
Material contacts membrane
Membrane forms around material
Breaks free inside the cell
2 types:
Pinocytosis = bringing in fluids
Phagocytosis = bringing in solids

6. 5.2 Active Transport pp

7. 5.2 Active Transport pp

8. Material is wrapped in membrane Combines with cell membrane
5.2 Active Transport pp
Exocytosis:
Material is wrapped in membrane
Combines with cell membrane
Opens and releases to outside of cell

9. 5.2 Active Transport pp

10. 5.2 Active Transport pp

11. 5.2 Active Transport pp