Download The Skeletal and Muscular Systems

Mrs. Keadle JH Science
Name__________________________________ date _______________________ period _____
The Skeletal and Muscular Systems
procedure
1. Flex your right arm and wrap your left hand around your
bicep and triceps muscle by placing your fingers over your
bicep and your thumb on your triceps.
2. Bend and straighten your arm several times and feel the two
main muscles working under your skin.
3. Working in pairs, help each other to measure the bicep length when it is straightened
(relaxed) and bent (contracted). Record your measurements in cm in the chart.
4. Working in pairs, help each other measure the circumference of the bicep and triceps when
straight and bent. Record your measurements in cm in the chart.
straight (relaxed)
bent (contracted)
bicep length
triceps length
bicep/triceps
circumference
5. Using the digital microscope and the muscle tissue slide, draw a sketch of what you see.
1
The Skeletal and Muscular System
Mrs. Keadle JH Science
questions
1. How did the biceps and triceps change as you bent and straightened your arm? __________
___________________________________________________________________________
___________________________________________________________________________
2. How do the skeletal muscles cause bones to move? _________________________________
___________________________________________________________________________
___________________________________________________________________________
3. What did your finding about the thickness of the upper arm suggest about how muscles
work?_____________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
Use the Skeletal and Muscular System Power Point to help you answer the following questions.
organ
system
main
organs
function
interacts
with:
skeletal
system
muscular
system
2
The Skeletal and Muscular System
Mrs. Keadle JH Science
10 What would happen to your body if you
had little or no bone marrow?
A Your other systems would make up for
it
B You would not have enough red blood
cells
11 Microtubules help provide support for
the cell. What body system has the
same function?
A skeletal system
B digestive system
C circulatory system
C Nothing would happen to you.
D respiratory system
D You would not have enough cartilage.
3
The Skeletal and Muscular System
Mrs. Keadle JH Science
Part of Muscular System
Description
smooth muscle
Found in digestive tract and walls of blood vessels. Acts
involuntarily.
cardiac muscle
Specialized muscle found only in the heart. Acts
involuntarily.
skeletal muscle
Attached to bones to aid movement. Acts voluntarily
and involuntarily.
tendons
Strands of tough connective tissue that connect skeletal
muscles to bones.
12 As part of an extended field investigation, Steve made the table above to
summarize facts about the muscular system. Based on the information in the
table, it can be concluded that
A there are three types of muscle
B tendons act voluntarily
C only skeletal muscle can act involuntarily
D not here
4
The Skeletal and Muscular System
Mrs. Keadle JH Science
13 Why is the biceps classified as a skeletal
muscle?
A It is attached to bones and is used to
move them.
14 How do pairs of skeletal muscles work
together?
A Both muscles contract at the same time.
B Both muscles extend at the same time.
B It reacts and tires slowly
C It is involuntary
D It is found in internal organs
C While one muscle in the pair contracts, the
other returns to its original length.
D One muscle in the pair pulls on the bone,
while the second muscle pulls on the first
muscle.
15 How do voluntary and involuntary muscles differ in structure and function?
5
The Skeletal and Muscular System