Transcript Power in Pairs

Power in Pairs
An investigation into how
muscles work together
Step #1

Seated partner:



Place his/her hands under the edge of the table
Apply gentle upward pressure
Standing partner:

Feel the front and back of the person’s arm
(bicep/ triceps)
1. Write down how your partner’s bicep and tricep
felt when pushing up in a complete sentence.
Step #2

Seated partner:


Put hands on top of the table and push downward
Standing partner:

Feel the front and back of your partner’s arm
(bicep/ triceps)
2. How did your partner’s bicep and tricep feel when
pushing down?
Step #3

Switch positions and repeat steps 1 and 2
Step #1 (after partners switch)

Seated partner:



Place his/her hands under the edge of the table
Apply gentle upward pressure
Standing partner:

Feel the front and back of the person’s arm
(bicep/ triceps)
Step #2 (after partners switch)

Seated partner:


Put hands on top of the table and push downward
Standing partner:

Feel the front and back of your partner’s arm
(bicep/ triceps)
3. Based on these observations, how do you think the
muscles in your arm work?
Answer the following questions in your
science notebook
1. Write down how your partner’s bicep and tricep felt
when pushing up in a complete sentence.
2. Write down how your partner’s bicep and tricep felt
when pushing down in a complete sentence.
3. Based on these observations, how do you think the
muscles in your arm work?
Do we have to tell our muscles
to work???
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Voluntary:
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
Choose for it to happen or under your control
Involuntary:

It happens without you choosing or thinking about it
3 Types of Muscle

Cardiac muscle:

Found only in the heart

Function = pumps blood through the body

Involuntary (works without your control)
3 Types of Muscle
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Skeletal muscle:
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Attached to skeleton

Function = moves bones

Voluntary (under your control)
3 Types of Muscle

Smooth muscle:

Found in blood vessels and parts of the digestive
system

Function = moves food and blood

Involuntary (works without your control)
Where are muscles found?
1.
Draw a person (NO STICK PEOPLE).
2.
Label at least 3 parts that are made of skeletal
muscle (Label part and type of muscle)
3.
Label at least 3 parts that are made of smooth
muscle (Label part and type of muscle)
4.
Draw and label where cardiac muscle is found
(Label part and type of muscle)
5.
Write a short paragraph explaining what you drew.
***There should be at least 7 muscles labeled