phisiology lab

Topics: Diffusion, Protein, Molecular diffusion Pages: 4 (583 words) Published: December 3, 2013

Exercise 1: Cell Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results
You scored 50% by answering 2 out of 4 questions correctly. 1. Molecules need a carrier protein to help them move across a membrane because Your answer : a. they are not lipid soluble.
Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion?
You correctly answered: c. Movement is passive and down a concentration gradient. 3. Examples of solutes that might require facilitated diffusion include Your answer : a. glucose.
Correct answer: d. all of the above. 4. Which of the following would not affect the rate of facilitated diffusion? You correctly answered: a. the amount of intracellular ATP 04/05/13 page 1

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?
Your answer : b. The glucose transport rate will increase. Predict Question 2: What effect do you think adding Na+ Cl- will have on the glucose transport rate? Your answer : c. There will be no change in 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?
You correctly answered: a. The glucose transport rate increased. Describe the conditions that resulted in the fastest rate of glucose transport. You correctly answered: d. 700 glucose carrier proteins and 8 mM glucose Why do you think equilibrium wasn't reached?
You correctly answered: b. The membrane proteins were saturated. Experiment Data:

Run Number
Solute
Start Conc. L
Start Conc. R
Carriers
Rate
1
Glucose
2.00
0.00
500
0.0008
2
Glucose
8.00
0.00
500
0.0023
3
Glucose
2.00
0.00
700
0.0010
4
Glucose
8.00
0.00
700
0.0031
5
Glucose
10.00
0.00
100
0.0017#
6
Na+ Cl-
0.00
2.00
700
0.0042
6
Glucose...
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