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Human Physiology (BIOL 3120 ) PEX-02-02 - Physio Ex 9.1

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Sandra Watson
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University of Houston-Downtown

Human Physiology Laboratory (BIOL 3120 )

Name: Steffany A. RiveraExercise 2: Skeletal Muscle Physiology: Activity 2: The Effect of Stimulus Voltage on Skeletal Muscle Contraction Lab
Report
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. Skeletal muscle fibers are innervated (stimulated) by

2. A single action potential propagating down a motor axon results in

3. In resting skeletal muscle, calcium is stored in

4. During the latent period for an isometric contraction

Experiment Results
Predict Question:
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?

Stop & Think Questions:
What do you see in the active force display when the stimulus voltage is set to 0.0, and why does this observation make
sense?

6. Enter the threshold voltage for this experiment in the field below and then click Submit Data to record your answer in the
lab report

12. Enter the maximal voltage for this experiment in the field below and then click Submit Data to record your answer in the
lab report.

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 Human Physiology (BIOL 3120 ) PEX-02-02 - Physio Ex 9.1

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