Muscular System
1.
p. 24-28 Human Biology & Health Textbook
Complete the Chart:
Involuntary Muscle
Voluntary Muscle
Definition
2-3 Examples of
when you use
each type
2. Look on page 27, what is meant by muscles “working in pairs”?
Use p. 25-26 to draw each type of muscle cells in the circle. Then describe the
location and function of the specific type of muscle in the box.
1. Skeletal
2. Smooth
3. Cardiac
Question: Will your muscles work better warm or cold?
Hypothesis: I think my muscles will work better _____________________ because ____________________________________________________________________________________________
Procedure:
1.
2.
Grip a clothespin with your thumb and index finger of your writing hand. Squeeze the clothespin open and shut as quickly as possible for 2 minutes. In your group, somebody should time the
two minute, someone else should count the “clicks” and the third person should actually be using their muscles to open and close the clothespin. Then, you will rotate jobs.
Repeat the procedure above, but submerge your hand in ice water for 30 seconds before counting the clicks.
Data Table:
Student #1
Student #2
Student #3
Student #4
Find the MEAN for all
students in group
Warm Hand
Cold Hand
Graph: Make a simple bar graph comparing the AVERAGES of warm and cold hand clicks. Don’t forget
to include: Labels, title, key and colors!
Title: _________________________________________________________________________
Conclusions:
1. Of the 3 muscles types from the front of this lab, what type of
muscle do you think you were using for this lab? Why do you
think that?
2. Why do you think it’s important to stretch or “warm up”
before a workout or sports activity?