enzymes that allow something on one layer of the membrane to be switched to the other layer (very selective in what they flip) transmembrane proteins (spans both layers), and monolayer associated proteins (in one layer) loosely associated proteins like lipid-linked proteins (not physically part of membrane but linked through a lipid) or protein-attached proteins the concept that membrane proteins will move laterally around the cell (unless tight junctions block) experiment that proves lateral diffusion in which proteins are tagged with fluorescence then one area is bleached, and after some time other proteins fill in the area and bleached ones diffuse so much so that they are indiscernible passive transport for small non-polar molecules going with their gradient (high to low) passive transport for larger molecules (even with a little polarity) usually involving proteins with channels a protein that carries out facilitated diffusion that has a very specific shape so only certain molecules can fit a bind (slow) a protein that carries out facilitated diffusion that has a hydrophilic pore and discriminates the molecules it lets through by size and charge (fast) a factor that drives passive transport (high concentration -> low concentration)

1. Flippases

enzymes that allow something on one layer of the membrane to be switched to the other layer (very selective in what they flip)

2. Integral Membrane Proteins

transmembrane proteins (spans both layers), and monolayer associated proteins (in one layer)

3. Peripheral Membrane Proteins

loosely associated proteins like lipid-linked proteins (not physically part of membrane but linked through a lipid) or protein-attached proteins

4. Lateral Movement of membrane proteins

the concept that membrane proteins will move laterally around the cell (unless tight junctions block)

5. FRAP (fluorescent recovery after photobleaching)

experiment that proves lateral diffusion in which proteins are tagged with fluorescence then one area is bleached, and after some time other proteins fill in the area and bleached ones diffuse so much so that they are indiscernible

6. Diffusion

passive transport for small non-polar molecules going with their gradient (high to low)

7. Facilitated Diffusion

passive transport for larger molecules (even with a little polarity) usually involving proteins with channels

8. Transporter

a protein that carries out facilitated diffusion that has a very specific shape so only certain molecules can fit a bind (slow)

9. Channel Protein

a protein that carries out facilitated diffusion that has a hydrophilic pore and discriminates the molecules it lets through by size and charge (fast)

10. Concentration Gradient

a factor that drives passive transport (high concentration -> low concentration)