Multiple Choice
Which of the following best describes the sarcomere in the context of the sliding filament theory?
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9. Muscle Tissue
Sliding Filament Theory and the Sacromere
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Which of the following proteins makes up the thick filament of the sarcomeres?
A
Troponin
B
Actin
C
Tropomyosin
D
Myosin
Verified step by step guidance1
Understand the structure of a sarcomere: A sarcomere is the basic contractile unit of muscle fiber, composed of thick and thin filaments.
Identify the components of the thick filament: The thick filament is primarily composed of the protein myosin.
Differentiate between thick and thin filaments: Thin filaments are primarily made of actin, along with regulatory proteins like troponin and tropomyosin.
Recognize the role of myosin: Myosin is a motor protein that interacts with actin to facilitate muscle contraction through cross-bridge cycling.
Conclude that myosin is the protein that makes up the thick filament in sarcomeres, distinguishing it from the other proteins listed.
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