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Physio Ex Exercise 2 Activity 2
Course: Anatomy And Physiology (BIOL 2201)
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University: Community College of Rhode Island
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PhysioEx Lab Report
Exercise 2: Skeletal Muscle Physiology
Activity 2: The Effect of Stimulus Voltage on Skeletal Muscle Contraction
Name: Kaley Faucher
Date: 15 September 2020
Session ID: session-396eb12a-276e-7095-8187-b3b40d434cd2
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
Experiment Results
Predict Question
Stop & Think Questions
Skeletal muscle fibers are innervated (stimulated) by
You correctly answered: motor neurons.
1
A single action potential propagating down a motor axon results in
You correctly answered: a single action potential and a single contractile event in the muscle
fibers it innervates.
2
In resting skeletal muscle, calcium is stored in
You correctly answered: the sarcoplasmic reticulum.
3
During the latent period for an isometric contraction
You correctly answered: the cellular events involved in excitation-contraction coupling occur.
4
Predict Question: As the stimulus voltage is increased from 1.0 volt up to 10 volts, what will
happen to the amount of active force generated with each stimulus?
Your answer: The active force will continually increase.
1
What do you observe in the active force display when the stimulus voltage is set to 0.0, and
why does this observation make sense?
You correctly answered: 0.00; there was no activation of skeletal muscle fibers by this
stimulus.
1
What is the lowest stimulus voltage that induces active force in the skeletal muscle?2
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