1. ACTIVE transport!

2. What is it? Molecules move “up” concentration gradient LOW HIGH
Ion channels, carrier proteins act like pumps

3. What happens? Molecule binds to specific protein Protein changes shape
Protein transports molecule

4. Where do cells get the energy?
Directly or indirectly from ATP(THE energy molecule)!!
adenine
Phosphate groups
5 – carbon sugar

5. Example: Sodium-Potassium Pump
Keep balance of sodium and potassium ions
3 Na+ out, 2 K+ in
Cystic fibrosis is a disease resulting from faulty pump

6. Movement in Vesicles Large molecules require help Two Types:
Endocytosis – ingest fluids & macromolecules from outside cell
Pinocytosis – solutes and fluids
Phagocytosis –large particles
Animation

7. Exocytosis - vesicle fuses with membrane and releases contents to outside

8. Transport Review 