Multiple Choice
Which of the following does not occur during a muscle contraction?
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8. Protein Function
Skeletal Muscle Contraction
Multiple Choice
In skeletal muscle sarcomeres, which protein is the primary component of the thick filament?
A
Tropomyosin
B
Myosin
C
Actin
D
Troponin
Verified step by step guidance1
Understand the structure of the sarcomere, which is the basic contractile unit of skeletal muscle. It consists of thick and thin filaments arranged in a repeating pattern.
Recall that the thick filament is primarily composed of a motor protein responsible for muscle contraction, while the thin filament contains proteins involved in regulation and structure.
Identify the proteins listed: Tropomyosin and Troponin are regulatory proteins associated with the thin filament, and Actin is the main protein of the thin filament itself.
Recognize that Myosin is the motor protein that forms the thick filament and interacts with actin to generate contraction through ATP hydrolysis.
Conclude that the primary component of the thick filament in skeletal muscle sarcomeres is Myosin.
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