GENERAL ANATOMY
MUSCLE ANATOMY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sarcolemma
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sarcoplasm
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sarcomere
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fascicle
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Detailed explanation-1: -A sarcomere is the region from one Z line to the next Z line. Many sarcomeres are present in a myofibril, resulting in the striation pattern characteristic of skeletal muscle. Myofibrils are composed of smaller structures called myofilaments .
Detailed explanation-2: -The section of a myofibril from one Z-line to the next Z-line is called a SARCOMERE. The arrangement of these sarcomeres next to each other produces the STRIATIONS of the skeletal muscle fibers.
Detailed explanation-3: -The part between the two Z-lines is called a sarcomere.
Detailed explanation-4: -The correct option is C one Z line to the next Z line.
Detailed explanation-5: -When (a) a sarcomere (b) contracts, the Z lines move closer together and the I band gets smaller. The A band stays the same width and, at full contraction, the thin filaments overlap. When a sarcomere shortens, some regions shorten whereas others stay the same length.