1. Warm-Up # /8/12
5) Osmosis and diffusion are examples of what type of transport?
6) What type of transport requires energy?

2. Active Transport
Unit 4

3. Active Transport EQ Obj
Why is active transport essential for life on Earth?
Obj
Differentiate between the four types of active transport

4. Active Transport
Cell must move material UP the concentration gradient from areas of low to high.
USE OF ENERGY (ATP)!!!
Like walking UP a SLIDE

5. How’s it work? Uses carrier proteins
Act as pumps that use energy to move ions and molecules across the membrane
Important in maintaining ion concentration in cells

6. Active Transport in Plants
Enables roots to absorb nutrients from the soil
Without active transport, nutrients would diffuse out of the roots.
Plants get nutrients AGAINST the concentration gradient (against GRAVITY)

7. Bulk Transport of STUFF
Some molecules such as complex proteins are to LARGE to cross the cell membrane
Large molecules of food and other substances are packaged in membrane bound sacs called vesicles and moved across the membrane

8. Happens Four Ways
Endocytosis
Exocytosis
Phagocytosis
Pinocytosis

9. Endocytosis
Cell membrane folds into a POUCH that encloses the particles
Pouch pinches off INSIDE the cell to form a vesicle
Vesicle releases contents into the cytoplasm

10. Two Types of Endocytosis
Phagocytosis—Cell engulfs a food particle or other cells
“CELL EATING”
Vesicle fuses with a lysosome
How we get rid of bacteria
Pinocytosis– Cells engulf liquid/fluid
“CELL DRINKING”

11. Exocytosis Opposite of endocytosis
Waste and cell products LEAVE the cell
Products made in the cell are packaged in the golgi, and secreted out of the cell
“Cell throwing up”

14. Create a Venn Diagram
Compare and contrast Passive and Active Transport