• Research work
    stimulation of one motor unit causes weak contraction throughout the whole muscle B. Muscle Twitch - the response of a muscle to a single short electrical stimulus 1. strong twitch - many motor units activated; weak twitch - few motor units are activated 2. latent period (3 ms) - time after stimulation for...
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  • anatomy
    Manning__ LAB TIME/DATE ___10/24/13__ Exercise 2 Skeletal Muscle Physiology The Muscle Twitch and the Latent Period 1. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal muscle fiber-fibers attached to the skeleton that produce...
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  • Physioex Exercise 2 Activity 4
    Physiology: Activity 3: The Effect of Stimulus Frequency on Skeletal Muscle Contraction Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. During a single twitch of a skeletal muscle You correctly answered: b. maximal force is never achieved. 2. When a skeletal...
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  • activity 2
    Name: Cassidy Lessig Activity 1 The Muscle Twitch and the Latent Period 1. 1. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period 2. What .is the role of acetylcholine in a skeletal muscle contraction? Skeletal muscle fiber-Skeletal...
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  • Skeletal Muscle Lab
    of contraction of the muscle cell is called excitation-contraction coupling. In this experiment, when we used a single electrical stimulus, it resulted in a muscle twitch with three phases: latent period, contraction phase, and the relaxation phase. Activity 1: Figure 1: Identifying the latent period ...
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  • Anatomy
    A ___4___ is the response of a muscle to a single, brief threshold stimulus. When the frequency of stimulation is so high that the muscle tracing shows fused peaks, ___5___ has been achieved. ___6___ is the stimulus strength at which the first observable muscle contraction occurs The phenomenon...
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  • Mrs Peterkin
    physioex 9.0 Purpose Does the duration of the latent period change with different stimulus voltage? What is the role of acetylcholine in a skeletal muscle contraction? Hypothesis I predict that the latent period will not change if the stimulant is increased or decreased. Materials ...
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  • Muscle Phsyiology
    Purpose: The Purpose of this exercise is to understand how muscle twitch, contract and react to different activities. Exercise 1: Muscle Twitch A. What is a muscle twitch? A muscle twitch is the fasciculation , or "muscle twitch", is a small, local, involuntary muscle contraction and relaxation...
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  • Fart
    EXERCISE 2: Skeletal Muscle Physiology Student Name: Student ID#: ACTIVITY 1: The Muscle Twitch and the Latent Period Answers 1. The latent period of the skeletal muscle that was tested in this lab simulation was a. about 1 second. b. less than 1 msec. c. between 2-3 msec. d. variable...
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  • Phyisoex 9.0 Reveiw 2
    Activity 1 – The Muscle Twitch and Latent 1) Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal Muscle Fiber: Skeletal muscle cells that are composed of hundreds to thousands of individual cells that produce muscle tension....
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  • Physiology
    Exercise2_JohnSmith.doc. Please make sure that your answers are typed in RED. (You may delete these instructions before submission.) ACTIVITY 1: The Muscle Twitch and the Latent Period Answers 1. The latent period of the skeletal muscle that was tested in this lab simulation was a. about 1 second. b. less...
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  • Exorsize 1
    lab will be worth a total of 76 points but will be converted to a percentage grade when registered in your “Gradebook”. |ACTIVITY 1: The Muscle Twitch and the Latent Period |Answers | |The latent...
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  • Exercise 2: Skeletal Muscle Physiology
    lab will be worth a total of 45 points but will be converted to a percentage grade when registered in your “Gradebook”. ACTIVITY 1: The Muscle Twitch and the Latent Period Answers 1. The latent period of the skeletal muscle that was tested in this lab simulation was a. about 1 second. b. less...
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  • Physioex 9.0 Exercise 2
    lab will be worth a total of 76 points but will be converted to a percentage grade when registered in your “Gradebook”. |ACTIVITY 1: The Muscle Twitch and the Latent Period |Answers | |The latent...
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  • Physiolab 9.0 Exercise 2
    TIME/DATE _______________________ Exercise 2 Skeletal Muscle Physiology The Muscle Twitch and the Latent Period 1. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Motor unit- single α-motor neuron and all of the corresponding muscle...
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  • Que Que Que
    2. Define a muscle twitch. 3. Define the threshold. - minimum stimulus to cause contraction. 4. Define a skeletal muscle fiber. 5. What are the components of a skeletal muscle fiber? Myofilaments of myfibrils. 6. What is an electrical stimulus? Change in polarity...
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  • Anatomy Chapter 9 Notes
    are composed of muscle fibers. 3. The largest active force that could be generated in the muscle is Activity 1 was _______ grams. 1.82 grams 4. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Skeletal Muscle Fiber: Skeletal muscle...
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  • Lab Frog Muscle (Guide Experiment)
    (threshold), subminimal, maximal, and supramaximal stimulus. 2. Explain what is meant by a “graded” response. 3. Draw a diagram of the setup used in this lab exercise. 4. Calculate the work that is done in a given muscle. 5. Describe the function of a force displacement transducer. 6. Describe what...
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  • Muscle Lab
    muscles to work in a practical sense, (d) is the method used to produce a slow, steady increase in muscle force. When we see the slightest evidence of force production on a tracing, the stimulus applied must have reached (e) . The weakest stimulation that will elicit the strongest contraction...
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  • Skeletal Muscle Physiology
    from a printed graph, you measure the time between the application of the stimulus and the beginning of the first observable response(increase in force). The computer can’t “look ahead,” anticipating the change in active force. To measure the length of the latent period using the computer, click the...
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