Muscle Lab Report Essay

1930 Words Apr 27th, 2013 8 Pages
Lab Report Assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Exercise 1: Muscle Twitch

Study the data for the three muscles in Tables 1A, 1B, and 1C.

1. Make a scatter plot graph in Microsoft Excel® using Data Tables 1A, 1B, and 1C that show the twitch tension timelines of the eye, rectus
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Data Table 4A: Incomplete tetanus||
Time
(milliseconds)|Tension
(kilogram-force)|
0|0|
3|5|
5|3|
7|7|
9|5|
11|9|
13|7|
15|11|
17|9|
19|15|
21|13|
24|15|
27|13|
30|15|

Data Table 4B: Complete tetanus
Time
(milliseconds)
Tension
(kilogram-force)
0
0
3
5
5
7
7
9
9
11
11
13
13
15
15
17
17
20
19
20
21
20
24
20
27
10
30
0

3. Use arrows to indicate where the subsequent stimuli occurred on the graph.

4. Graph the information for complete tetanus on a separate time vs. tension scatter plot graph.
Connect the lines of each data point to get a better understanding of the data.

5. Use arrows to indicate the subsequent stimuli on the graph.

Questions

A. What is the difference between complete and incomplete tetanus?
With incomplete tetanus muscles contract but there is a period of relaxation between contractions. As shown on a graph, it looks like a wave. With complete tetanus, there is no relaxation between contractions and on a graph, this is represented by a straight line. Tetanus effects only striated skeletal muscles, not cardiac (heart) muscles.

B. Will muscle fatigue occur quicker in complete or incomplete tetanus? Explain your reasoning.
It will occur in complete tetanus because of lose of chemical transmitter more rapidly in complete tetanus

Exercise 5: Demonstrating Muscle Fatigue

Data Table 5: Muscle fatigue|||||

Trial|Start Time
(seconds)|Aching/Burning

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