Skeletal Muscle Worksheet
Explore the structure and function of skeletal muscle with this Grade 9 science worksheet, covering muscle contraction, organization, and types of fibers.
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Skeletal Muscle Worksheet
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Date:
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Read each question carefully and answer to the best of your ability. Refer to your notes and textbook if needed.
1. Which of the following is NOT a characteristic of skeletal muscle?
Voluntary control
Striated appearance
Found in organ walls
Attached to bones
2. The functional unit of skeletal muscle is the:
Myofibril
Sarcomere
Muscle fiber
Fascicle
3. Skeletal muscles are attached to bones by tough connective tissues called .
4. The two main proteins involved in muscle contraction are and .
5. The process by which a muscle fiber shortens is known as the theory of muscle contraction.
6. All skeletal muscle fibers contract at the same speed.
True
False
7. Skeletal muscle contraction requires energy in the form of ATP.
True
False
8. Describe the role of calcium ions in skeletal muscle contraction.
9. Differentiate between fast-twitch and slow-twitch muscle fibers.
10. Label the following components of the muscle fiber cross-section:
A:
B:
C:
D: