PHYSIOLOGY
SKELETAL MUSCLE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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This is the smallest functional unit of the muscle fiber
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sarcomere
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sarcolemma
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sarcoplasm
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transverse tubules
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Explanation:
Detailed explanation-1: -A sarcomere (Greek sarx “flesh", meros “part") is the smallest functional unit of striated muscle tissue. It is the repeating unit between two Z-lines. Skeletal muscles are composed of tubular muscle cells (called muscle fibers or myofibers) which are formed during embryonic myogenesis.
Detailed explanation-2: -A sarcomere is a muscle fiber’s basic contractile unit. Actin and myosin, the active components that cause muscle contraction, are found in each sarcomere. The sarcomere is made up of half of each adjacent I-band and A-band. The functional unit of myofibril is the sarcomere.
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