PhysioEx Exercise 2 Activity 1
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Jan 9, 2024
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8
Uploaded by erasco03
10/3/23, 11:27 AM
PhysioEx Exercise 2 Activity 1
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PhysioEx Lab Report
Exercise 2: Skeletal Muscle Physiology
Activity 1: The Muscle Twitch and the Latent Period
Name: Elijah Rascon
Date: 3 October 2023
Session ID: session-482d9f34-c9a7-c299-7d5d-106767e736b2
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Experiment Results
Predict Question
Skeletal muscles are connected to bones by
You correctly answered:
tendons.
1
Skeletal muscles are composed of hundreds to thousands of individual cells called
You correctly answered:
fibers.
2
The term motor unit refers to
You correctly answered:
one motor neuron and all of the skeletal muscle fibers it innervates.
3
The motor neuron and muscle fiber intersect at what is called
You correctly answered:
the neuromuscular junction.
4
A twitch is
You correctly answered:
one contractile response to a single action potential.
5
10/3/23, 11:27 AM
PhysioEx Exercise 2 Activity 1
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Stop & Think Questions
Experiment Data
Voltage (v)
Length (mm)
Active Force
Passive Force
Total Force
Latent Period
(msec)
0
75
0
0
0
----
3
75
1.04
0
1.04
----
4
75
1.32
0
1.32
3.20
2
75
0.66
0
0.66
3.20
4
75
1.32
0
1.32
3.20
6
75
1.65
0
1.65
3.20
8
75
1.81
0
1.81
3.20
10
75
1.82
0
1.82
3.20
Predict Question: Will changes to the stimulus voltage alter the duration of the latent period?
Your answer:
Yes, changing the stimulus voltage will change the latent period duration proportionately.
1
What is the period of time that elapses between the generation of an action potential and the start of muscle
tension development in a muscle fiber?
You correctly answered:
The latent period.
1
What occurs during the latent period of these isometric contractions?
You correctly answered:
All the steps of excitation-contraction coupling occur.
2
10/3/23, 11:27 AM
PhysioEx Exercise 2 Activity 1
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Voltage = 0 V
Voltage = 3 V
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Related Questions
Question 6
B.
Increasing fremency of stimulation
Using the Myogram above, what does line C represent?
Contractile period
Latent period
O Summation
Residual force
Tidal volume
Tetanus
Lag time
Fatigue
electromyography
Relaxation period
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bbhosted.cuny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_22
Question Completion Status:
QUESTION 13
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H
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Enter your answer here
G
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1. message that travels to neurons
3. abnormal growth in the brain
4. receive messages from another cell
5. harmless tumor
7. conducts messages away from cell body
8. carry information between 2 neurons
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O O
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