# Muscle Lab Report

Topics: Muscle contraction, Muscle, Muscular system / Pages: 8 (1942 words) / Published: May 9th, 2013
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 femoris, and plantaris muscle fibers. For each muscle, connect the dots together in sequence. Refer to the section in the Introduction of this lab manual titled: “Computer Graphing Using Microsoft Excel®” for help with this process.

2. Graph all three sets of data on one graph. Label the three muscles on the graph. Then, graph each muscle set on three separate graphs. Label the latent period, contraction phase and relaxation phase on the three separate graphs. Connect the dots of the scatter plot graph to make a line graph for each muscle.

Data Table 1A: Muscle twitch of the lateral rectus eye muscle||
Time
(milliseconds)|Tension
(kilogram-force)|
0|0|
1|0|
2|0|
3|10|
4|20|
5|30|
6|40|
7|30|
8|20|
9|10|
10|5|
11|2|
12|0|

Data Table 1B: Muscle twitch of quadriceps femoris||
Time
(milliseconds)|Tension
(kilogram-force)|
0|0|
3|10|
6|20|
9|30|
12|35|
15|40|
18|35|
21|30|
24|25|
27|22|
30|15|
33|12|
36|5|
39|0|

Data Table 1C: Muscle twitch of the plantaris||
Time
(milliseconds)|Tension
(kilogram-force)|
0|0|
5|5|
10|15|
15|20|
20|25|
25|30|
30|32|
35|36|
40|40|
45|38|
50|35|

55|32|
60|25|
65|22|
70|18|
75|15|
80|12|
85|10|
90|5|
95|3|
100|0|
Questions