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Florida International University ZOO 3731L Lab 1 Ex
Florida International University
ZOO 3731L
Lab 1 Ex.2
1)Molecules need a carrier protein to help them move across a membrane
- Which of the following is true of facilitated diffusion?
.
- Which of the following would not affect the rate of facilitated diffusion?
Experiment Results Predict Question:
Predict Question 1: What effect do you think increasing the number of protein carriers will have on the glucose transport rate?
Predict Question 2: What effect do you think adding Na+ Cl- will have on the glucose transport rate?
Stop & Think Questions:
- What happened to the glucose transport rate when the glucose concentration was increased from 2 mM to 8 mM?
- Describe the conditions that resulted in the fastest rate of glucose transport.
- Why do you think equilibrium wasn't reached?
|
Run Number |
Solute |
Start Conc. L |
Start Conc. R |
Carriers |
Rate |
|
1 |
Na+ Cl- |
0.00 |
0.00 |
500 |
0.0000 |
|
1 |
Glucose |
2.00 |
0.00 |
500 |
0.0008 |
|
2 |
Na+ Cl- |
0.00 |
0.00 |
500 |
0.0000 |
|
2 |
Glucose |
8.00 |
0.00 |
500 |
0.0023 |
|
3 |
Na+ Cl- |
0.00 |
0.00 |
700 |
0.0000 |
|
3 |
Glucose |
2.00 |
0.00 |
700 |
0.0010 |
|
4 |
Na+ Cl- |
0.00 |
0.00 |
700 |
0.0000 |
|
4 |
Glucose |
8.00 |
0.00 |
700 |
0.0031 |
|
5 |
Na+ Cl- |
0.00 |
0.00 |
100 |
0.0000 |
|
5 |
Glucose |
10.00 |
0.00 |
100 |
0.0028# |
|
6 |
Na+ Cl- |
0.00 |
2.00 |
700 |
0.0042 |
|
6 |
Glucose |
2.00 |
0.00 |
700 |
0.0010 |
Post-lab Quiz Results
- What variable(s) increased the rate of facilitated diffusion of glucose?
- For facilitated diffusion, increasing the concentration of glucose on one side of the membrane is the same
- When all of the membrane carriers are engaged, or busy, we say they
- Na+ Cl- had no effect on glucose transport because
Review Sheet Results
- Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it is different from simple diffusion.
- The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucose transport. Explain why the rate increased. How well did the results compare with your prediction?
- Explain your prediction for the effect Na+ Cl- might have on glucose transport. In other words, explain why you picked the choice that you did. How well did the results compare with your prediction?
Expert Solution
PFA
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