Human Biology WS 12A
Name___________________
Page______ Period _______
Chapter 12
Overview of the Muscular System
Instructions: Read pages 228-235 in your Human Biology textbook and
complete the following:
1. What is the function of all muscle regardless of their type?
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2. List the three types of muscles, describe it’s shape and where in the
human body would you find it:
a. ___________
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b. ___________
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c. ___________
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3. List five functions of skeletal muscle:
a. __________________________________________________
b. __________________________________________________
c. __________________________________________________
d. __________________________________________________
e. __________________________________________________
4. Describe the following basic structures of skeletal muscle
a. Fascicle: ___________________________________________
b. Fascia: ____________________________________________
c. Tendon: ___________________________________________
5. What is meant by the origin of a muscle?
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6. What is meant by the insertion of a muscle?
_______________________________________________________
7. What is a prime mover? ____________________________________
8. What is are synergist muscles? ______________________________
9. What are antagonist muscles? _______________________________
10. Which muscles are antagonist muscle to the biceps brachii?
____________________________
11. What happens if both antagonist groups contract at the same time?
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12. List and briefly explain examples of how muscles are named:
a. _______ ___________________________________
b. _______ ___________________________________
c. _______ ___________________________________
d.
e.
f.
g.
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13. Define the following microscopic structures of the skeletal muscle:
a. Sarcolemma: ________________________________________
b. Sarcoplasmic reticulum: ________________________________
c. T (transverse) tubules: ________________________________
d. Myofibrils: _________________________________________
e. Sarcomeres: ________________________________________
f. Myosin: ____________________________________________
g. Actin: _____________________________________________
h. I bands: ___________________________________________
i. A bands: ___________________________________________
j. Z lines: ____________________________________________
k. H zone: ____________________________________________
14. Summaries the sliding filament in the following space using the terms:
thick filament, thin filament, I bands, A bands, Z lines, H zones, cross
bridges and ATP:
_______________________________________________________
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15. What is a neuromuscular junction?
_______________________________________________________
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16. What is the neurotransmitter produced at the neuromuscular junction?
_________________________________
17. Memorize the major muscles by Friday!
18. Label the diagrams on the following page:
19. Label this drawing of the structure of the muscle fiber:
Qu ickTime™ an d a
TIFF (U nco mpre sse d) d ecom pre ssor
are nee ded to s ee th is p icture.
20. Label the following neuromuscular junctions and filaments:
Qu ickTime™ an d a
TIFF (U nco mpre sse d) d ecom pre ssor
are nee ded to s ee th is p icture.