1. Cellular transport
How are cells able to control what enters and what leaves the cell while maintaining homeostasis?

3. Two types of cellular transport
Active Transport
Passive Transport
Cell uses energy
Cell does not use energy

4. Passive transport Molecules move randomly
Molecules move from areas of high concentration to low concentration
Molecules move without use of energy

6. Types of passive transport
Simple Diffusion
Facilitated Diffusion
Osmosis

7. Passive transport – 1.simple diffusion
Random movement of particles from high concentration to low concentration
Continues until equilibrium is reached
Affected by: size of particles, concentration of particles, temperature

8. Passive transport – 2.facilitated diffusion
Diffusion of larger molecules through transport proteins within the membrane
-carrier or channel proteins
-transport proteins are specific – they only allow certain molecules to pass through the membrane
(EX: glucose, charged ions)
Channel Protein
Carrier Protein

9. Passive transport – 3.osmosis
Special type of diffusion where water will move through a selectively permeable membrane
Water moves from a high concentration to a low concentration

10. More about osmosis
Solute: the substance that is dissolved in a solvent (EX: sugar)
Solvent: the substance the the solute is dissolved in (EX: water)
Solution: solute + solvent
Three types of solutions
Hypertonic
Hypotonic
Isotonic

11. Hypertonic solution
The solution has a higher concentration of solutes and a lower concentration of water than inside of the cell

12. Hypotonic solution
The solution has a lower concentration of solutes and a higher concentration of water than inside of the cell
*Animal cells will swell and burst (cytolysis)

13. TURN AND TALK TO A PARTNER
An animal cell will swell and burst when placed into a hypotonic solution. When a plant cell is placed into a hypotonic solution, it will not. What prevents this from happening in the plant cell?

14. Vacuoles store water in a plant cell
Osmotic pressure: pressure exerted by the movement of water during osmosis in a plant cell

15. isotonic solution
The concentration of solutes in the solution is equal to the concentration of solutes inside of the cell
*Dynamic Equilibrium

16. Think Independently:
In your spiral, write down what type of solution each cell was placed into: A: B: C:

17. Active transport Cell uses energy
Molecules are actively moved to where they are needed
Movement occurs from an area of low concentration to an area of high concentration

18. Types of active transport
Protein Pumps
Endocytosis
Exocytosis

19. Active transport – 1.protein pumps
Protein pumps: transport proteins that require energy to do work
EX: Sodium/Potassium Pump
The protein must change shape to move molecules across the membrane : requires energy

20. Active transport – 2.endocytosis
Phagocytosis
Pinocytosis
Taking particles into the cell
Requires energy
How the cell “eats”
Taking liquid into the cell
Requires energy
How the cell “drinks”

22. Active transport – 3.exocytosis
Type of active transport where the cell transports molecules out of the cell
Requires energy

23. CELLULAR TRANSPORT ACTIVE TRANSPORT PASSIVE TRANSPORT EXOCYTOSIS
FACILITATED
DIFFUSION
PROTEIN PUMPS
SIMPLE
DIFFUSION
OSMOSIS
ENDOCYTOSIS
PHAGOCYTOSIS
PINOCYTOSIS