1. Biochemistry Free For All
Membrane Transport
Biochemistry Free For All

2. Chemical and Electrical Potential Across a Lipid Bilayer Barrier

3. Osmotic Pressure Across a Semipermeable Barrier

5. Types of Membrane Proteins

8. Three Types of Membrane Protein Ports
Symport
(Synport)
Uniport
Antiport

9. No Net Change in Charge
Net Change in Charge

10. Ion Channels

11. Ion Channel Features
1. General Structure
2. Opening
3. Filter
4. Effective Opening Size
5. Door

12. Closed
Open
Potassium Channel

13. Potassium Channel - Top-down View

14. Hydration Shell

16. Cellular Transport Types
Passive - Purely Diffusion Driven, Follows Concentration Gradient
Facilitated - Protein Guided, Follows Concentration Gradient
Active - Protein Guided, Energy Required to Move at Least One Molecule Against Concentration Gradient

17. Passive Transport - Purely Diffusion Driven

18. Ion Channels vs Transporters

19. Facilitated Diffusion

20. Active Transport

21. Sodium-Potassium ATPase
Higher K+
inside
Higher Na+
outside
Sodium-Potassium ATPase

22. Sodium/Glucose Symport
Secondary
Energy
Source
Sodium-Glucose Pump
Sodium/Glucose Symport

23. Lactose/Proton Symport
Lactose Permease
Lactose/Proton Symport

24. Secondary Energy Source - Protons
Lactose Permease
Secondary Energy Source - Protons

25. Voltage Change

26. Nerve Cell Transmission
1. Stimulus
2. Opening of Na+ gates
3. Na+ diffuses into cell
4. Voltage change causes K+ gates to open
5. K+ diffuses out of cell
6. All gates close
7. Wave of voltage changes moves down cell
8. Neurotransmitters move signal across cells
9. Na+ K+ ATPase restores gradients in originating cell

27. Stimulus, Na+ gates open
K+ gates open
Action Potential
Stimulus, Na+ gates open
Na+K+ ATPase acts

28. Transmission of signal from one cell to another
Gates
Gates
Wave of Na+ in, K+ out
Transmission of signal
from one cell to another

30. Bind Voltage Gated Na+ Channels
Tetrodotoxin
From Puffer Fish
Bind Voltage Gated Na+ Channels

31. Shellfish Toxin From Algal Blooms Sodium Channel Blocker
Saxitoxin
Shellfish Toxin From Algal Blooms
Sodium Channel Blocker