Skeletal Muscle Function Worksheet
Anatomy and physiology worksheet covering the structure and function of skeletal muscle for Grade 11 science students.
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Skeletal Muscle Function Worksheet
Name:
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 protein makes up the thick filaments in a sarcomere?
Actin
Myosin
Troponin
Tropomyosin
2. What is the primary function of the sarcoplasmic reticulum in muscle contraction?
Produce ATP
Store calcium ions
Synthesize proteins
Generate nerve impulses
3. A motor neuron and all the muscle fibers it innervates is called a .
4. The functional unit of a skeletal muscle is the , which extends from one Z-disc to the next.
5. During muscle contraction, the heads bind to actin, forming cross-bridges.
6. Briefly describe the role of ATP in muscle contraction and relaxation.
7. Skeletal muscle contractions are primarily involuntary.
True
False
8. The I band of a sarcomere contains only thin filaments.
True
False
9. Label the indicated parts of the muscle fiber cross-section.
A:
B:
C:
10. Explain the sliding filament model of muscle contraction, including the roles of actin, myosin, calcium, and ATP.
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