Compare and contrast facilitated diffusion and passive
diffusion. Explain how the sodium-potassium ion pump works. include
an explanation of why ATP is involved and how sodium and potassium
ions are “chemically moved” across the membrane.
4. (a) Name industrial
processes in which:
Diffusion in the solid is essential.
Diffusion in the solid must be prevented.
(b) Why are the steel gears case hardened? (5
p).
(c) For a 1020 steel
it has been determined that a carburizing treatment of 15 hr
duration at 900 0C will raise the carbon concentration
to 0.35 wt% at a point 2.0 mm from the surface. Estimate the time
necessary to achieve the same carbon concentration at a 6.0 mm...
1.Define facilitated diffusion.
Compare and contrast diffusion and facilitated diffusion.
a.Give an example of a molecule that
crosses the membrane using this mechanism.
Compare osmosis, simple diffusion, facilitated diffusion and
active transport: A) describe their differences and B) explain when
cells have to use each one.
Discuss the following different types of transmembrane
transport: passive diffusion, facilitate diffusion, and active
transport. Compare and contrast their respective advantages and
disadvantages and provide an example of each.