1. Section 5.2 Active Transport
Chapter 5
Section Active Transport

2. Active Transport
Movement of materials across a cell membrane that requires a cell to expend energy
Materials move UP their concentration gradient

3. Cell Membrane Pumps Moves substances up their concentration gradient
Moves from an area of lower concentration to an area of higher concentration

4. Sodium-Potassium Pump
A special protein that transports Na+ ions and K+ up their concentration gradients

5. To function properly, many animal cells must have a higher concentration of Na+ ions outside the cell and a higher concentration of K+ ions inside the cell

6. Endocytosis
Cells ingest external fluid, macromolecules, and large particles (including other cells)
Part of the cell forms a pouch around the material then pinches off to form a vesicle

7. Pinocytosis & Phagocytosis
Pinocytosis involves the transport of solutes or fluids
Phagocytosis involves the movement of large particles or whole cells

8. Exocytosis
Vesicles in the cytoplasm fuse with the cell membrane and release their contents out of the cell