1. Section 5: Active Transport
Chapter 3: Cells
Section 5: Active Transport
Chapter 3: Cells
Section 5: Active Transport

2. Active Transport Presentation Finish Red Onion Osmosis Lab
Chapter 3: Cells
Section 5: Active Transport
Agenda:
Do Now!
Active Transport Presentation
Finish Red Onion Osmosis Lab

3. Think about the words “endo-” and “exo-”
Chapter 3: Cells
Section 5: Active Transport
Do Now!
Think about the words “endo-” and “exo-”
For each, write down another word that contains these prefixes.
Next, write down what you think “endo-” and “exo-” mean.

4. Chapter 3: Cells
Section 5: Active Transport

5. In this case, to solutes go up or down the gradient?
Chapter 3: Cells
Section 5: Active Transport
Active Transport
Active transport moves solutes from low concentration to high concentration.
Molecules move “up” or “against” the gradient.
It is “active”: it uses energy input from the cell.
In this case, to solutes go up or down the gradient?

6. through protein transport pumps Exocytosis Endocytosis Phagocytosis
Chapter 3: Cells
Section 5: Active Transport
Active Transport
Three major types of active transport:
through protein transport pumps
Exocytosis
Endocytosis
Phagocytosis

7. Chapter 3: Cells
Section 5: Active Transport
Transport pumps
Transport pumps are proteins that use energy to move solutes through the membrane, against the gradient.
They change shape as they work, opening, closing, and exposing new binding sites.

8. Active Transport (YouTube link)
Chapter 3: Cells
Section 5: Active Transport
Active Transport (YouTube link)

9. Sodium-Postassium Pump (YouTube link)
Chapter 3: Cells
Section 5: Active Transport
Sodium-Postassium Pump (YouTube link)

10. Chapter 3: Cells
Section 5: Active Transport
Exocytosis
“Exo” means “outside”; “cyto” means “cell”; “osis” means “process”
the process by which a cell releases substances by the fusion of a vesicle with the membrane.
Allows the cell to release molecules that are too big for transport channels.
Example: Neurotransmitters

11. Exocytosis (YouTube link)
Chapter 3: Cells
Section 5: Active Transport
Exocytosis (YouTube link)

12. This is how neuro-transmitters work!
Chapter 3: Cells
Section 5: Active Transport
This is how neuro-transmitters work!

13. Endocytosis “Endo” means “inside”; “cyto” means “cell”
Chapter 3: Cells
Section 5: Active Transport
“Endo” means “inside”; “cyto” means “cell”
the process by which a cell takes liquids or fairly large molecules into a cell by engulfing them in a membrane.
Allows the cell to bring in molecules that are too big for transport channels.
Example: White blood cells eating infectious bacteria
Endocytosis

14. Endocytosis (YouTube link)
Chapter 3: Cells
Section 5: Active Transport
Endocytosis (YouTube link)

15. Example: White blood cells eating infectious bacteria
Chapter 3: Cells
Section 5: Active Transport
Phagocytosis
“phago” means “eat”
a type of endocytosis in which the cell membrane engulfs large particles.
Example: White blood cells eating infectious bacteria

16. Chapter 3: Cells
Section 5: Active Transport

17. Exo- and Endocytosis (YouTube link)
Chapter 3: Cells
Section 5: Active Transport
Which is this?
Endocytosis!
Which is this?
Exocytosis!
Exo- and Endocytosis (YouTube link)