physio ex activity 1

Topics: Diffusion, Molecular diffusion, Protein Pages: 4 (521 words) Published: May 28, 2014
Exercise 1: Cell Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results
You scored 25% by answering 1 out of 4 questions correctly.
1. Molecules need a carrier protein to help them move across a membrane because Your answer : c. they are too large.
Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion?
Your answer : d. Movement is active and down a concentration gradient. Correct answer: c. Movement is passive and down a concentration gradient. 3. Examples of solutes that might require facilitated diffusion include Your answer : b. sodium.

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

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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 : a. The glucose transport rate will increase.
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
1
2
3
4
5
6
6

Solute
Glucose
Glucose
Glucose
Glucose
Glucose
Na+ ClGlucose

Start Conc. L
2.00
8.00
2.00
8.00
10.00
0.00
2.00

Start Conc. R
0.00
0.00
0.00
0.00
0.00
2.00
0.00

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