PHYSIOLOGY
MICROSCOPIC MUSCLE ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sarcomere
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Osteon
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Myofilament
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Muscle fiber
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Detailed explanation-1: -A sarcomere is the basic contractile unit of a myocyte (muscle fibre). A sarcomere is composed of two main protein filaments (thin actin and thick myosin filaments) which are the active structures responsible for muscular contraction.
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.
Detailed explanation-3: -Sarcomeres are the smallest functional contractile unit of muscle, and myofibrils are striated muscle organelles that are comprised of sarcomeres that are strictly aligned in series.