Multiple Choice
Within a sarcomere, the overlap of actin and myosin filaments produces which band?
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9. Muscle Tissue
Sliding Filament Theory and the Sacromere
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the context of sliding filament theory, what is the functional unit of muscle contraction?
A
Tendon
B
Myofibril
C
Sarcomere
D
Fascicle
Verified step by step guidance1
Understand that the sliding filament theory explains how muscles contract by the interaction of actin and myosin filaments within muscle fibers.
Recognize that muscle fibers contain many myofibrils, which are long, cylindrical structures made up of repeating units.
Identify that the repeating unit within a myofibril responsible for contraction is called the sarcomere.
Know that the sarcomere is defined by the area between two Z discs and contains the organized arrangement of actin (thin) and myosin (thick) filaments.
Conclude that the sarcomere is the functional unit of muscle contraction because it is the segment where the sliding of filaments occurs, leading to muscle shortening.
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