1. Cell Transport

2. 1. ACTIVE TRANSPORT is the movement of particles across the membrane from low to high concentration (less to more).
B. Active Transport

3. a. ACTIVE TRANSPORT requires energy because it goes against the concentration gradient.

4. 2. Proteins called PUMPS use energy to move materials across the membrane in ACTIVE TRANSPORT.

5. a. PUMPS can move more than one substance at a time, in the same or opposite directions.

6. 1. Very large particles cannot fit through proteins in the membrane. 2
1. Very large particles cannot fit through proteins in the membrane. 2. In this case, the membrane can be pinched to bring in or release large particles.
C. Large Particles

7. a. ENDOCYTOSIS - cell membrane surrounds an outside object, pinches around it, and brings it into the cell in a VACUOLE.

8. Thinking question: What kinds of objects may require ENDOCYTOSIS
Thinking question: What kinds of objects may require ENDOCYTOSIS? Thinking question: How does a cell avoid engulfing a cell from its own organism? WBC chases bacteria

9. b. EXOCYTOSIS – the cell sends large, membrane-bound materials from the GOLGI to the edge of the cell to release them.

10. Both 1 Active Transport Passive Transport
-Requires NO energy
Diffusion - through phospholipids
-Move materials across a membrane
-Requires energy
Molecular Transport - Particles enter/exit through proteins
Osmosis - through aquaporins
-Help maintain homeostasis
- Bulk Transport - Exocytosis and Endocytosis
Facilitated diffusion - uses proteins
-Moves AGAINST concentration gradient (low to high)
-Moves WITH concentration gradient (high to low)