Biology · Support and Movement
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Sarcomere is part of myofibril between:
- A
Two I bands
- B
Two A bands
- C
Two M lines
- D
Two Z lines
A sarcomere is the basic structural and functional unit of a muscle fiber, specifically within striated muscle such as skeletal and cardiac muscle. It is defined as the segment of the myofibril that lies between two adjacent Z-discs (or Z-lines).
A sarcomere is the functional unit of a myofibril, defined as the segment between two Z-lines (or Z-discs), not between two I bands. The I bands are lighter regions flanking the Z-lines, containing only thin actin filaments, while the A bands are darker regions containing overlapping thick (myosin) and thin (actin) filaments.
A sarcomere is the fundamental contractile unit of striated muscle fibers, defined as the segment between two Z-lines (or Z-discs). Each sarcomere contains a single A-band, which corresponds to the length of the thick (myosin) filaments. Therefore, a sarcomere cannot span between two A-bands, as each A-band is contained within its sarcomere.
A sarcomere is defined as the segment between two Z-lines (or Z-discs) in a myofibril. The M-line is located at the center of the sarcomere, within the A-band, and serves as the attachment site for thick (myosin) filaments.
A sarcomere is the basic structural and functional unit of a muscle fiber, specifically within striated muscle such as skeletal and cardiac muscle. It is defined as the segment of the myofibril that lies between two adjacent Z-discs (or Z-lines).
Tagged under Biology · Support and Movement · 2024