Scelta multipla
What generates the force that shortens the sarcomeres to bring about muscle contraction?
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9. Muscle Tissue
Sliding Filament Theory and the Sarcomere
Scelta multipla
What is the part of a sarcomere that contains only thin filaments?
A
A band
B
H zone
C
Z line
D
I band
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Begin by understanding the structure of a sarcomere, which is the basic unit of a muscle's striated muscle tissue. It is composed of thick and thin filaments arranged in a repeating pattern.
Identify the different bands and zones within a sarcomere: the A band, I band, H zone, and Z line. Each has distinct characteristics based on the arrangement of filaments.
The A band contains both thick and thin filaments, while the H zone is a region within the A band that contains only thick filaments.
The Z line is the boundary between adjacent sarcomeres and anchors the thin filaments, but does not itself contain filaments.
The I band is the region that contains only thin filaments. It spans the distance between the ends of the thick filaments in adjacent sarcomeres, making it the correct answer to the question.
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