Biol 212 Worksheet:
Muscular System
Supplemental Instruction
Iowa State University
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Course:
Instructor:
Date:
Greg
Biology 212 (2)
Kukday
11/29/15
1. REVIEW: What are the three general steps in sensation? What determines the strength
of a stimulus?
2. REVIEW: Draw and label the structures of the human ear and eye. How is a stimulus
detected in the ear and eye?
3. What is the difference between flexors and extensors?
4. What are the three types of muscle tissues? Differentiate between them.
5. What are the three types of skeletal muscles? Differentiate between them.
6. Relate muscles, fascicles, myofibrils and muscle fibers.
7. What is a sarcomere? Draw a sarcomere. What are actin and myosin?
8. Describe how muscle contraction occurs. What is moving and what is shortening?
9. What are the four steps of the cross-bridge cycle?
10. TEST QUESTION: What type of muscle tissue is considered striated?
a. Smooth muscle
c. Skeletal muscle
b. Cardiac muscle
d. Both b and c
11. TEST QUESTION: What shortens during muscle contraction?
a. Actin
c. Sarcomeres
b. Myosin
d. Both a and b
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