1. Do Now Put your homework in bin. What will happen if you placed an animal cell in a hypotonic solution?

2. Announcements Study Guide due Friday Test on Monday

3. Active Transport The movement of molecules from an area of low concentration to an area of high concentration (LOW  HIGH) Requires the use of energy (ATP) Three Types: 1. Protein Pump 2. Endocytosis 3. Exocytosis

4. 1. Protein Pumps (active transport) 1. Protein Pumps - transport proteins that require energy (ATP) to do work. EX: Sodium Potassium Pumps (Active Transport using proteins)Sodium Potassium Pumps Protein changes shape to move molecules: this requires energy!

5. Endocytosis (Endo=in) "Cell Eating" 2. Endocytosis: the process in which a cell takes in bulky material, like a macromolecule. Uses energy Cell membrane folds around food particles forms food vacuole & digests food This is how white blood cells eat bacteria! ​

6. ENDOCYTOSIS

7. Exocytosis (Ex = exit/out) 3. Exocytosis: the process in which large molecules are released from the cell. Membrane of the vacuole surrounding the material fuses With cell membrane and releases the material out of the cell Cell changes shape – requires energy Ex: Hormones or wastes released from cell

8. Why Does Active Transport Require Energy?

9. Exit Slip: Venn Diagram Compare Active Transport to Passive Transport