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Lab 7 The Muscular System BIO201L
Student Name: Click here to enter text.
Access Code (located on the lid of your lab kit): Click here to enter text.
Pre-Lab Questions
”1. How do banding patterns change when a muscle contracts?”
Click here to enter text. ”2. What is the difference between a muscle organ, a muscle fiber, myofibril and a myofilament? ”
Click here to enter text. ”3. Outline the molecular mechanism for skeletal muscle contraction. At what point is ATP used and why? ”
Click here to enter text. ”4. Explain why rigor mortis occurs. ”
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Experiment 1: Tendons and Ligaments
Post-Lab Questions
”1. Label the arrows in the slide images below based on your observations from the experiment. ”
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B- Click here to enter text. C- Click here to enter text.
D- Click here to enter text. E- Click here to enter text.
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Experiment 1 Post Lab Tendon Muscle Insertion Labeling Image 1
Experiment 1 Post Lab Tendon Muscle Insertion Labeling Image 2
”2. How does the extra cellular matrix of connective tissues contribute to its function? ”
Click here to enter text. ”3. Why are tendons and ligament tissues difficult to heal? ”
Click here to enter text. ”4. What difference do you see between the tendon – muscle insertion image and the tendon image? ”
Click here to enter text. ”5. What differences do you see between the tendon and ligament sections? ” Click here to enter text.
Experiment 2: The Neuromuscular Junction
Post-Lab Questions
”1. Are there few or many nuclei at the end plate? ”
Click here to enter text. ”2. What is a motor unit? ”
Click here to enter text. ”3. How is a greater force generated (in terms or motor unit recruitment)? ”
Click here to enter text. ”4. What types of sensors are present within the muscle to identify how much force is generated? ” Click here to enter text.
Experiment 3: Muscle Fatigue
Table 2: Experimental Counts
Trial 1
Trial 2
Trial 3
Trial 4
Trial 5
Predicted Value
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Actual Value
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Post-Lab Questions
”1. How did the predicted results compare to the actual results? ”
Click here to enter text. ”2. Did you notice any changes in the number of repetitions you could perform, or how your hand felt after each of the trials? ”
Click here to enter text. ”3. Explain the actions that were occurring at the cellular level to produce this movement. Include sources of energy and any possible effect of muscle fatigue. ”
Click here to enter text. ”4. Hypothesize what would happen if blood flow was restricted to the hand when this experiment is performed. ”
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Experiment 4: Gross Anatomy of the Muscular System
Table 3: Gross Anatomy Data
Movement
Muscle(s) Activated
Action(s) of Muscle(s)
Forearm Extended (Step 1)
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Fingers Extended and Splayed (Step 1)
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Fingers Retracted (Step 1)
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Forearm Pressed Down Upon (Step 2)
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Elbow Bent (Step 3)
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Arm Raised to Side with Heavy Object (Step 4)
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Arm Extended Back with Heavy Object (Step 4)
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(lower limbs; student selects action…)
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(lower limbs; student selects action…)
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(lower limbs; student selects action…)
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(lower limbs; student selects action…)
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(lower limbs; student selects action…)
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(lower limbs; student selects action…)
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(lower limbs; student selects action…)
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Post-Lab Questions
Label the human muscle diagram.
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B - Click here to enter text.
C - Click here to enter text.
D - Click here to enter text.
E - Click here to enter text.
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