Simple Diffusion

788 Words Oct 20th, 2010 4 Pages
Simple Diffusion
Activity 1: Simulating Simple diffusion
1. What is the molecular weight of Na+? 22.99 or 23
2. What is the molecular weight of Cl-? 35.45
3. Which MWCO dialysis membranes allowed both of these ions through?50,100, 200
4. Which materials diffused from the left beaker to the right beaker? Urea, NaCl and glucose diffused
5. Which did not? Why? Albumin was too large to diffuse into the right beaker.

Activity 2: Simulating Dialysis
6. What happens to the urea concentration in the left beaker (the patient)? Its concentration gradient changes and causes it to move down.
7. Why does this occur? It happened because the more concentrated it became it causes the molecules to move down.

Facilitated Diffusion
…show more content…
no it does not generate.
20. Why or why not?
21. Would pressure be generated if you had 9 mM glucose on one side of a 200 MWCO membrane and 9 mM NaCl on the other side? If so, which solution was generating the pressure? yes in the side with the glucose.
22. Would pressure be generated if you had 9 mM albumin on one side of a 200 MWCO membrane and 9 mM NaCl on the other side? If so, which solution was generating the pressure?Yes, The Albumin was generating the pressure .

Filtration
Activity 5: Filtration
23. What were the results of your initial membrane analysis?
24. Does the membrane MWCO affect filtration rate? Yes, the smaller the mwco the smaller the pore sizes are and they affect the filtration rate.
25. Does the amount of pressure applied affect the filtration rate?yes.
26. Did all solutes pass through all the membranes? no.
27. If not, which one(s) did not? urea was the only one not present.
28. Why?Urea does not diffuse freely.
29. How can the body selectively increase the filtration rate of a given organ or organ system? By increasing or decreasing the blood supply to the given organ or system.

Active Transport
Activity 6: Active Transport
30. At the end of this experimental run, did the Na+/Cl- move from the left vessel to the right vessel? No it did not.
31. Why? Because its supposed to move form a lower to a higher concentration area in this case it was the opposite.
32.

More about Simple Diffusion