imo 2014
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Name: aulia 1 Exercise 2: Skeletal Muscle Physiology: Activity 1: The Muscle Twitch and the Latent Period Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 11/20/14 page 1
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Transcript of imo 2014
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Name: aulia 1
Exercise 2: Skeletal Muscle Physiology: Activity 1: The Muscle Twitch and the Latent Period Lab Report
Pre-lab Quiz ResultsYou have not completed the Pre-lab Quiz.
11/20/14 page 1
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Experiment ResultsPredict Question:Predict Question: Will changes to the stimulus voltage alter the duration of the latent period?Your answer : b. No, changing the stimulus voltage will not change the latent period duration.
Stop & Think Questions:What is the period of time that elapses between the generation of an action potential and the start of muscle tensiondevelopment in a muscle fiber?Your answer : b. the contractile periodCorrect answer: c. the latent period
What occurs during the latent period of these isometric contractions?Your answer : a. The length of the muscle fiber is sliding into an optimal length.Correct answer: b. All the steps of excitation-contraction coupling occur.
Experiment Data:
Voltage Length Active Force Passive Force Total Force Latent Period0.0 75 0.0 0.0 0.0 ----3.0 75 1.04 0.0 1.04 ----4.0 75 1.32 0.0 1.32 ----2.0 75 0.66 0.0 0.66 ----10.0 75 1.82 0.0 1.82 ----
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Post-lab Quiz ResultsYou have not completed the Post-lab Quiz.
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Review Sheet Results1. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period.You did not answer this question.
2. What is the role of acetylcholine in a skeletal muscle contraction?You did not answer this question.
3. Describe the process of excitation-contraction coupling in skeletal muscle fibers.You did not answer this question.
4. Describe the three phases of a skeletal muscle twitch.You did not answer this question.
5. Does the duration of the latent period change with different stimulus voltages? How well did the results compare withyour prediction?You did not answer this question.
6. At the threshold stimulus, do sodium ions start to move into or out of the cell to bring about the membranedepolarization?You did not answer this question.
