1. Active Transport DOES Require energy (or ATP)
The Plasma Membrane
12/3/2018
Active Transport
DOES Require energy (or ATP)
Moves materials from LOW to HIGH concentration.
It goes AGAINST the concentration gradient
G. Podgorski, Biol. 1010

2. Types of Active Transport
Sodium Potassium Pumps (Active Transport using proteins)
Some transport proteins require energy to do work
These “Protein Pumps” change shape to move molecules: this requires energy!

3. 19) Large molecules move materials into the cell by endocytosis.
The Plasma Membrane
2 Ways to Move the “Big Stuff”
12/3/2018
19) Large molecules move materials into the cell by endocytosis.
G. Podgorski, Biol. 1010

4. The Plasma Membrane
Endocytosis
12/3/2018
It takes in dissolved molecules as a “vesicle” is being formed.
This is sometimes called “Cell eating”. .
G. Podgorski, Biol. 1010

5. Now Watch it Work!  Endocytosis: taking bulky material into a cell
Uses energy
Cell membrane surrounds the food particle
Called “cell eating” because it forms a food vacuole & digests food
This is how white blood cells eat bacteria!

6. Another Way to Move the “Big Stuff”
The Plasma Membrane
Another Way to Move the “Big Stuff”
12/3/2018
2) Exocytosis- moving large things out.
20.)Large molecules are moved out of the cell by vesicles that fuse with the cell membrane through exocytosis.
Exocytosis is how many hormones are secreted and how nerve cells communicate with one another.
G. Podgorski, Biol. 1010

7. Endocytosis & Exocytosis animations
Now Watch it work! 
Exocytosis: a process that forces material out of cell “in bulk”
Membrane surrounds the material and fuses with the cell membrane
Cell changes shape – requires energy
EX: Hormones or wastes released from cell
Endocytosis & Exocytosis animations

8. Animation of Types of Active Transport
Endocytosis & Exocytosis animations

9. Active vs Passive transport
Is similar to riding a bike…It takes no energy to ride the bike and carry things downhill… (passive transport)
But it takes energy to ride a bike to carry you uphill…(active transport)

10. Types of Cellular Transport
Animations of Active Transport & Passive Transport
high
low
Weeee!!!
Passive Transport
cell doesn’t use energy
Diffusion
Facilitated Diffusion
Osmosis
Active Transport
cell does use energy
Protein Pumps
Endocytosis
Exocytosis
high
low
This is
gonna be hard work!!