PHYSIOLOGY
SARCOMERE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Contains myosin and overlapping actin filaments
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H zone
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I band
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Z disc
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A band
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Explanation:
Detailed explanation-1: -The myosin and actin filaments overlap in peripheral regions of the A band, whereas a middle region (called the H zone) contains only myosin. The actin filaments are attached at their plus ends to the Z disc, which includes the crosslinking protein -actinin.
Detailed explanation-2: -The A band in skeletal muscle is also called as anisotropic band. The anisotropic band is made of both actin filaments and myosin filaments.
Detailed explanation-3: -Actin filaments, the thin filaments, are the major component of the I-band and extend into the A-band. Myosin filaments, the thick filaments, are bipolar and extend throughout the A-band.
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