Fluid mosaic
Fluidity
Diffusion
Facilitated
Active transport
Bulk transport
Practice
build it and test it
the finished membrane
name the parts
transport proteins
receptor and sugar chains
cholesterol
junction to the next cell
drag a part into the bilayer
glucose arrives
K+ must be pumped in
insulin arrives
it is chilled, then warmed
ATP in the cytoplasm
Run the test
Start again
temperature
25 °C
unsaturated tails
50 %
cholesterol
25 %
concentration outside
34
concentration inside
10
temperature
25 °C
exchange surface
60 %
diffusion distance
2.0
glucose outside
12.0
carrier proteins
3
compare with simple diffusion
what to watch
the sodium–potassium pump
glucose co-transport in the ileum
cyanide: no ATP is made
process
phagocytosis — a whole bacterium
pinocytosis — a droplet of fluid
exocytosis — a vesicle empties outside
size of the cargo
2.04 µm
the fluid mosaic model
1
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Answer
Check
Hint
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How to think about it
Common mistakes