1. Cellular Transportation
Maintaining Equilibrium

2. Movement of particles across the cell membrane without using energy
Cellular Transport
Passive Transport
Movement of particles across the cell membrane without using energy
Three Modes of Passive Transport
Diffusion
Facilitated Diffusion
Osmosis

3. Cellular Transport
Diffusion
Movement of particles from an area of high concentration to an area of lower concentration
Initial Conditions
Diffusion
Low
High
High
Low

4. Diffusion is controlled by
Cellular Structure and Function
Cellular Transport
Diffusion is controlled by
Temperature
Pressure
Concentration
Dynamic Equilibrium
Reached when diffusion of material into the cell equals diffusion of material out of the cell
Molecules continue to move, but the overall concentration remains the same.

5. Cellular Structure and Function
Cellular Transport
Diffusion in a Cell

6. Facilitated Diffusion
Cellular Structure and Function
Cellular Transport
Facilitated Diffusion
Movement of materials across the plasma membrane using proteins
Channel Proteins
Carrier Proteins

7. Diffusion of water across a selectively permeable membrane
Cellular Structure and Function
Cellular Transport
Osmosis
Diffusion of water across a selectively permeable membrane
Three Types of Solutions
Isotonic
Hypotonic
Hypertonic

8. Passive Transport

9. Cellular Structure and Function

10. Cellular Structure and Function
Cellular Transport
Isotonic Solution
Water and dissolved substances diffuse into and out of the cell at the same rate.
Plant Cell
Blood Cell
11,397x

11. Solute concentration is higher inside the cell.
Cellular Structure and Function
Cellular Transport
Hypotonic Solution
Solute concentration is higher inside the cell.
Water diffuses into the cell.
The cell swells and may burst!
Plant Cell
Blood Cell
13,000x

12. Solute concentration is higher outside the cell.
Cellular Structure and Function
Cellular Transport
Hypertonic Solution
Solute concentration is higher outside the cell.
Water diffuses out of the cell.
The cell will shrink!
Plant Cell
Blood Cell
13,000x

13. Active Transport Using Carrier Proteins
Cellular Structure and Function
Cellular Transport
Active Transport
Movement of particles across the cell membrane using energy
The protein or membrane changes shape=energy used
Active Transport Using Carrier Proteins

14. Types of Active Transport Pumps
Cellular Structure and Function
Cellular Transport
Types of Active Transport Pumps
Na+/K+ ATP pump
Moves three Na+ ions out of the cell and two K+ ions into the cell

15. Process by which the cell surrounds and takes particles into the cell
Cellular Structure and Function
Cellular Transport
Endocytosis
Process by which the cell surrounds and takes particles into the cell
“Cell Eating”
Exocytosis
Secretion of material out of the plasma membrane
“Cell Pooping”

16. Active Transport

17.
Cellular transport video