Moves up concentration gradient (from low to high) 5.2 Active Transport pp. 101-104 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

Sodium-Potassium pump 3 Na+ ions from inside cell bind to protein 5.2 Active Transport pp. 101-104 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

5.1 Passive Transport pp. 95-99

Membrane-wrap to pass membrane: 5.2 Active Transport pp. 101-104 Membrane-wrap to pass membrane: Endocytosis = moving materials into the cell (into cell) Exocytosis = moving materials out of cell (exit cell)

Material contacts membrane Membrane forms around material 5.2 Active Transport pp. 101-104 Endocytosis: Material contacts membrane Membrane forms around material Breaks free inside the cell 2 types: Pinocytosis = bringing in fluids Phagocytosis = bringing in solids

5.2 Active Transport pp. 101-104

5.2 Active Transport pp. 101-104

Material is wrapped in membrane Combines with cell membrane 5.2 Active Transport pp. 101-104 Exocytosis: Material is wrapped in membrane Combines with cell membrane Opens and releases to outside of cell

5.2 Active Transport pp. 101-104

5.2 Active Transport pp. 101-104

5.2 Active Transport pp. 101-104