1. Transport into and out of cells

2. Figure: 04-03
Title:
Eukaryotic Cell
Caption:
This cutaway view of a eukaryotic cell displays the elements that nearly all such cells possess: a nucleus, other membrane-bound organelles, a jelly-like cytosol, a cytoskeleton, and an outer plasma membrane.

3. Structure of Plasma Membrane

4. Molecular structure Hydrophobic molecules pass through
Hydrophilic molecules bounce off

5. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Facilitated Diffusion
Osmosis
Active transport
Requires energy
Exocytosis
Endocytosis
Pumps

6. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Osmosis
Active transport
Requires energy
Exocytosis
Endocytosis
Pumps

7. Diffusion
Movement of molecules from an area of high concentration to an area of lower concentration.

9. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Facilitated Diffusion
Osmosis
Active transport
Requires energy
Exocytosis Endocytosis
Pumps

10. Facilitated Diffusion
Moves molecules that cannot pass through the membrane unaided
Middle sized
Polar and hydrophilic
Molecules pass through a protein channel
Channels do not control movement

11. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Facilitated Diffusion
Osmosis
Active transport
Requires energy
Exocytosis Endocytosis
Pumps

12. Osmosis Water moves towards area of high solute concentration.
The diffusion of water
Osmotic Pressure
The force with which water moves toward the area of low concentration

13. Osmotic Conditions Tonicity referrers to the solute (salt)
Hyper- = Higher salt
Iso- = Same salt
Hypo- = Lower salt
Hypotonic
Hypertonic
Isotonic
Cytolysis
Crenated
No change

14. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Osmosis
Active transport
Requires energy
Exocytosis
Endocytosis
Pumps

15. Exocytosis Movement of objects out of the cell
Vesicle binds to the membrane

16. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Osmosis
Active transport
Requires energy
Exocytosis
Endocytosis
Pumps

17. Endocytosis (Phagocytosis)
Movement of large objects
Cytoskeleton changes membrane shape into a pseudopod
Object is imported

18. White blood cell eating a bacterium

19. Receptor Mediated Endocytosis (Pinocytosis)
Picky eating
Desired object binds to receptors
Full receptors signal vesicle formation

20. Types of transport Passive transport Active transport
Requires no energy
Diffusion
Osmosis
Active transport
Requires energy
Exocytosis
Endocytosis
Pumps

21. Pumps ATP is used for power
Work against osmotic or electrical gradient