BIOS252 Week 1 PowerPhys2 Lab Report - LABORATORY REPORT Activity 2 Twitch Contractions and Summation Name Instructor Date PREDICTIONS Effect of Muscle

BIOS252 Week 1 PowerPhys2 Lab Report - LABORATORY REPORT...

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LABORATORY REPORT Activity 2: Twitch Contractions and Summation Name: Instructor: Date: PREDICTIONS Effect of Muscle Fiber Length on Contraction 1. As muscle fiber length increases: Effect of Stimulation Frequency on Contraction 2. As the frequency of stimulation increases, the force of contraction: MATERIALS AND METHODS Measurement of Threshold Stimulus 1. Dependent Variable 2. Independent Variable 3. Controlled Variables Effect of Muscle Length on Contraction 1. Dependent Variable 2. Independent Variable 3. Controlled Variables Effect of Stimulation Frequency on Contraction 1. Dependent Variable 2. Independent Variable 3. Controlled Variables
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4. What structure was stimulated to cause a muscle contraction? 5. Explain why the temperature of the water bath was 35ºC (95 ºF). 6. At a stimulation frequency of 15 Hz how many stimuli were there per second? RESULTS See Table 4: Measurement of Threshold Stimulus See Graph: Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus?
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  • Winter '15
  • muscle fiber length

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