MUSCLE NERVE CARTILAGE BONE
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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M line
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A band
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I band
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Z line
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Detailed explanation-1: -The H zone-the central region of the A zone-contains only thick filaments and is shortened during contraction.
Detailed explanation-2: -In the middle of the A band, where only thick filaments are present, is a region called the H zone; the H zone looks somewhat lighter than the overlap region of the A band. Also in the A band is a narrow, lightly stained region that contains bare thick filaments without cross bridges and is called the pseudo-H zone.
Detailed explanation-3: -The thick filament is located at the center of the sarcomere as the giant elastic protein connectin/titin spans half sarcomere along the thick filaments, linking the Z‐band and the M‐lines (Labeit & Kolmerer, 1995; Maruyama, 1976; Wang, McClure, & Tu, 1979).