Scelta multipla
What term is used for the plasma membrane of a muscle fiber?
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9. Muscle Tissue
Structure of a Skeletal Muscle
Scelta multipla
What protein primarily composes the thin filaments in the sarcomere according to the sliding filament theory?
A
Actin
B
Tropomyosin
C
Troponin
D
Myosin
Guida verificata passo dopo passo1
Understand the structure of the sarcomere: The sarcomere is the basic contractile unit of muscle fiber, composed of thick and thin filaments.
Identify the components of the thin filament: The thin filament is primarily composed of three proteins: actin, tropomyosin, and troponin.
Focus on the primary protein: Among the proteins in the thin filament, actin is the most abundant and forms the backbone of the thin filament structure.
Differentiate between the roles of the proteins: Actin provides the structural framework, while tropomyosin and troponin regulate the interaction between actin and myosin during muscle contraction.
Relate to the sliding filament theory: According to the sliding filament theory, actin (thin filament) and myosin (thick filament) interact to produce muscle contraction, with actin being the primary protein in the thin filament.
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