Skeletal Muscle Worksheet
Explore the structure and function of skeletal muscle at a Grade 10 level, covering topics like muscle fibers, contraction, and types of muscle.
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Skeletal Muscle Worksheet
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. Which of the following is the smallest contractile unit of skeletal muscle?
Muscle fiber
Myofibril
Sarcomere
Fascicle
2. What is the primary function of acetylcholine in muscle contraction?
To block calcium release
To bind to troponin
To initiate an action potential in the muscle fiber
To provide energy for contraction
3. The connective tissue layer that surrounds an entire muscle is called the .
4. During muscle contraction, the filaments slide past the filaments.
5. Describe the role of calcium ions in skeletal muscle contraction.
6. Differentiate between fast-twitch and slow-twitch muscle fibers.
7. Examine the muscle fiber cross-section below and answer the questions.
a) Identify one structure labeled in the diagram that is directly involved in ATP production for muscle contraction.
b) Explain the function of the sarcoplasmic reticulum shown in the diagram.
8. All skeletal muscles are voluntary.
True
False
9. Skeletal muscle cells are typically multinucleated.
True
False
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