PEX 02 06
Name: GEBRIE; GARCIA ANDI
Exercise 2: Skeletal Muscle Physiology: Activity 6: The Skeletal Muscle Length-Tension Relationship Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. During an isometric contraction
You correctly answered: d. the skeletal muscle is generating force, but it remains at a fixed length.
2. The force that results from muscles being stretched is
You correctly answered: a. passive force.
3. Active force
You correctly answered: b. is determined by the amount of myosin bound to actin.
4. When you generate the isometric length-tension curve, which of the following forces will not be indicated on your screen? You correctly answered: c. tetanic force
5. Passive force in skeletal muscle is largely caused by
You correctly answered: c. the protein titin.
11/17/14
page 1
Experiment Results
Predict Question:
Predict Question: As the resting length of the muscle is changed, what will happen to the amount of total force the muscle generates during the stimulated twitch?
Your answer : c. Total force can increase or decrease depending upon the starting resting length.
Stop & Think Questions:
Note the dip in total force at a muscle length of
90 mm as compared to the total force at a muscle length of 80 and 100 mm. Why does this occur?
You correctly answered: d. At this muscle length, active force has decreased in value and passive force has not yet increased to a significant value.
Experiment Data:
Voltage
8.5
8.5
8.5
8.5
8.5
Length
75
70
80
90
100
Active Force
1.82
1.75
1.75
1.21
0.11
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page 2
Passive Force
0.0
0.0
0.02
0.25
1.75
Total Force
1.82
1.75
1.77
1.46
1.86
11/17/14
page 3
11/17/14
page 4
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page 5
11/17/14
page 6
Post-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. When a skeletal muscle is stimulated and generates force but remains at a fixed length
You correctly answered: d. the muscle is contracting isometrically.
2. Which protein is
Exercise 2: Skeletal Muscle Physiology: Activity 6: The Skeletal Muscle Length-Tension Relationship Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. During an isometric contraction
You correctly answered: d. the skeletal muscle is generating force, but it remains at a fixed length.
2. The force that results from muscles being stretched is
You correctly answered: a. passive force.
3. Active force
You correctly answered: b. is determined by the amount of myosin bound to actin.
4. When you generate the isometric length-tension curve, which of the following forces will not be indicated on your screen? You correctly answered: c. tetanic force
5. Passive force in skeletal muscle is largely caused by
You correctly answered: c. the protein titin.
11/17/14
page 1
Experiment Results
Predict Question:
Predict Question: As the resting length of the muscle is changed, what will happen to the amount of total force the muscle generates during the stimulated twitch?
Your answer : c. Total force can increase or decrease depending upon the starting resting length.
Stop & Think Questions:
Note the dip in total force at a muscle length of
90 mm as compared to the total force at a muscle length of 80 and 100 mm. Why does this occur?
You correctly answered: d. At this muscle length, active force has decreased in value and passive force has not yet increased to a significant value.
Experiment Data:
Voltage
8.5
8.5
8.5
8.5
8.5
Length
75
70
80
90
100
Active Force
1.82
1.75
1.75
1.21
0.11
11/17/14
page 2
Passive Force
0.0
0.0
0.02
0.25
1.75
Total Force
1.82
1.75
1.77
1.46
1.86
11/17/14
page 3
11/17/14
page 4
11/17/14
page 5
11/17/14
page 6
Post-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. When a skeletal muscle is stimulated and generates force but remains at a fixed length
You correctly answered: d. the muscle is contracting isometrically.
2. Which protein is