Question

virtual osmosis and diffusion lab
I need help with a few questions

Answer 1

Follow-up Questions:

1) To which substances was the dialysis tubing permeable?
A. Starch/sulfate ion
B. Starch/protein
(C. Chloride ion/sulfate ion)
D. Protein/chloride ion

2) To which substances was the dialysis tubing impermeable?
A. Starch/sulfate ion
(B. Starch/protein)
C. Chloride ion/sulfate ion
D. Protein/chloride ion

3) Suggest a reason for the failure of some substances to diffuse through the membrane. Hint: The chemical formula for sulfate is S04 and for starch (C6H10O5)700. ____________________________________

4) Can different materials diffuse through a membrane in opposite directions at the same time? Support your statement with evidence from your experiment. ______________________________________________________________________________________
5) In what way is the dialysis membrane like the cell membrane? ________________________________
______________________________________________________________________________________
6) In each case, the molecules moved from (High) concentration to (Low) concentration.

7) Dialysis is a technique used to purify blood in cases of kidney failure. During dialysis, what substances would you want to remove from the bloodstream? What substances would you want to remain in the bloodstream? Hint: You may have to look up how dialysis works online.

______________________________________________________________________________________

Answer 2

i answered as much as i can, i put parenthases around the stuff i answered, i need help with number 3, 4 5 and 7,

the virtual lab was http://bioweb.wku.edu/courses/Biol114/Osmosis/Osmosis1.asp

ive tried to do it, but i cant seem to answer these question,
the lab is short,