1. Cellular Processes and structure
03 Cell Structure
Osmosis
Cell Membrane
Membrane Transport
Eukaryotic cells

2. Membrane Transport AP Bio Framework: 2.A.2 Holtzclaw: 52-54 (7.3-7.5)
Campbell:

3. Passive transport does not require energy
Movement of molecules from high concentration to low concentration
“down” the concentration gradient
does not require energy
Used for
Import of resources
ex. oxygen, water, hormones
Export of waste
ex. carbon dioxide, lactate

4. Facilitated diffusion is a type of passive transport
Requires transmembrane proteins
specific to the substance that is transported
Does not require ATP
ex. glucose transporters

6. Active Transport requires energy
Membrane proteins
"Up" the concentration gradient
Requires energy
Usually ATP
Example: Na+ / K+ pump

7. Na+ / K+ pump

8. Na+ / K+ pump

9. Endocytosis and exocytosis move large molecules
Movement of large molecules out of the cell
Internal vesicles fuse with the plasma membrane
Ex. neurotransmitters

10. Endocytosis and exocytosis move large molecules (cont.)
macromolecules and particulate matter taken in by forming new vesicles
derived from the plasma membrane.
Ex. Phagocytes

11. Endocytosis and exocytosis move large molecules (cont.)
Both processes require energy and are initiated by proteins in membrane

12. Be able to
2.12 Use representations and mathematical models to determine whether dynamic homeostasis is maintained by the active movement of molecules across membranes.