Make a Lab report in about 2 pages from the lab results given in the below link (with MLA references).
PhysioEx Lab results report: https://drive.google.com/file/d/1sT_u7wV2DEi3yVMJ0Bw34rmW449LaoT9/view?usp=sharing
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Follow the rubric given below while making the report.
Lab Report Rubric: https://drive.google.com/file/d/1_cc9iPEc74KHTNnM_MpwLwF-9wDPSVp8/view?usp=sharing
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3/2021 PhysioEx Exercise 3 Activity 7
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act7/# 1/
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PhysioEx Lab Report
Exercise 3: Neurophysiology of Nerve Impulses
Activity 7: The Action Potential: Conduction Velocity
Name: Aalwin Thomas
Date: 23 March 2021
Session ID: session-aabab984-54ee-f45
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-4a02-82a25f3a0cc0
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Experiment Results
Predict Questions
An action potential can be propagated along an axon because there are _______ channels in
the membrane.
You correctly answered: voltage-gated.
1
The units of conduction velocity are
You correctly answered: meters/second.
2
Which of the following will affect axonal conduction velocity?
You correctly answered: both the diameter of the axon and the amount of myelination.
3
Which of the following describes an A fiber?
You correctly answered: large diameter, heavily myelinated.
4
Which of the following describes a C fiber?
You correctly answered: small diameter, unmyelinated.
5
Predict Question 1: How will the conduction velocity in the B fiber compare with that in the A
Fiber?
Your answer: The conduction velocity in the B fiber will be slower because the B fiber has a
smaller diameter and less myelination.
1
Predict Question 2: How will the conduction velocity in the C fiber compare with that in the B
Fiber?
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3/23/2021 PhysioEx Exercise 3 Activity 7
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act7/# 2/5
Stop & Think Questions
Your answer: The conduction velocity in the C fiber will be slower because the C fiber has a
smaller diameter and less myelination.
Note the difference in time between the action potential recorded at R1 and the action
potential recorded at R2. The distance between these sets of recording electrodes is 2
centimeters (0.02 m).
Convert the time from milliseconds to seconds, enter the time (in seconds).
You answered: 0.002 sec.
1
Calculate the conduction velocity in meters/second by dividing the distance between R1 and
R2 (0.02 m) by the time it took for the action potential to travel from R1 to R2.
Enter the conduction velocity.
You answered: 10 m/sec.
2
Note the difference in time between the action potential recorded at R1 and the action
potential recorded at R2.
Convert the time from milliseconds to seconds, enter the time (in seconds).
You answered: 0.01 sec.
3
Calculate the conduction velocity in meters/second by dividing the distance between R1 and
R2 (0.02 m) by the time it took for the action potential to travel from R1 to R2.
Enter the conduction velocity.
You answered: 2 m/sec.
4
Note the difference in time between the action potential recorded at R1 and the action
potential recorded at R2.
Convert the time from milliseconds to seconds, enter the time (in seconds).
You answered: 0.1 sec.
5
Calculate the conduction velocity in meters/second by dividing the distance between R1 and
R2 (0.02 m) by the time it took for the action potential to travel from R1 to R2.
Enter the conduction velocity.
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3/23/2021 PhysioEx Exercise 3 Activity 7
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act7/# 3/5
Experiment Data
Axon Type Myelination Stimulus
Voltage
(mV)
Distance
From R1 to
R2 (m)
Time
between
APs (msec)
Time
between
APs (sec)
Conduction
Velocity
(m/sec)
A fiber Heavy 30 0.02 2 0.002 10
B fiber Light 30 0.02 10 0.01 2
C fiber None 30 0.02 100 0.1 0.2
You answered: 0.2 m/sec.
3/23/2021 PhysioEx Exercise 3 Activity 7
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Post-lab Quiz Results
You have not completed the Post-lab Quiz.
Review Sheet Results
How did the conduction velocity in the B fiber compare with that in the A Fiber? How well did
the results compare with your prediction?
Your answer:
The results were equal to my answers.
1
How did the conduction velocity in the C fiber compare with that in the B Fiber? How well did
the results compare with your prediction?
Your answer:
The results were equal to my answers.
2
What is the effect of axon diameter on conduction velocity?
Your answer:
The Conduction velocity will be greater if the axon diameter is large.
3
What is the effect of the amount of myelination on conduction velocity?
Your answer:
If the amount of myelination is great, then the Conduction velocity will be larger.
4
Why did the time between the stimulation and the action potential at R1 differ for each
axon?
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3/23/2021 PhysioEx Exercise 3 Activity 7
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act7/# 5/5
Your answer:
The time between the stimulation and the action potential at R1 differed for each axon
because the diameter and the amount of myelination were varied.
Why did you need to change the timescale on the oscilloscope for each axon?
Your answer:
Change in timescale is necessary in order to see the action potentials. The velocity changes,
so when it gets very slow we need a longer time scale.
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