PhysioEx Exercise 1 Activity 2
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PhysioEx Exercise 1 Activity 2
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PhysioEx Lab Report
Exercise 1: Cell Transport Mechanisms and Permeability
Activity 2: Simulated Facilitated Diffusion
Name: Sophie Vanderkallen
Date: 3 February 2024
Session ID: session-7d60975f-6128-f82d-b174-73af43efd1c4
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
Experiment Results
Predict Questions
Stop & Think Questions
Molecules need a carrier protein to help them move across a membrane because
You correctly answered: they are lipid insoluble or they are too large.
1
Which of the following is true of facilitated diffusion?
You correctly answered: Movement is passive and down a concentration gradient.
2
Examples of solutes that might require facilitated diffusion include
You correctly answered: all of the above.
3
Which of the following would not affect the rate of facilitated diffusion?
You correctly answered: the amount of intracellular ATP.
4
Predict Question 1: What effect do you think increasing the number of protein carriers will
have on the glucose transport rate?
Your answer: The glucose transport rate will increase.
1
Predict Question 2: What effect do you think adding Na
Cl will have on the glucose transport
rate?
Your answer: The glucose transport rate will decrease.
2
+
-
What happened to the glucose transport rate when the glucose concentration was increased
from 2 mM to 8 mM?
1
2/3/24, 12:00 PM
PhysioEx Exercise 1 Activity 2
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Experiment Data
Run Number
Solute
Start Conc. L
(mM)
Start Conc. R
(mM)
Carriers
Rate
(mM/sec)
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
0.0017
6
Na
Cl
0.00
2.00
700
0.0042
6
Glucose
2.00
0.00
700
0.0010
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
You correctly answered: The glucose transport rate increased.
Describe the conditions that resulted in the fastest rate of glucose transport.
You correctly answered: 700 glucose carrier proteins and 8 mM glucose.
2
Why do you think equilibrium wasn't reached?
You correctly answered: The membrane proteins were saturated.
3
+
-
+
-
+
-
+
-
+
-
+
-
What variable(s) increased the rate of facilitated diffusion of glucose?
You correctly answered: increasing the concentration of glucose and increasing the number
of membrane carriers.
1
For facilitated diffusion, increasing the concentration of glucose on one side of the
membrane is the same as
You correctly answered: making the concentration gradient steeper.
2
When all of the membrane carriers are engaged, or busy, we say they are
You correctly answered: saturated.
3
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