PHYSIOLOGY
GENERAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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One functional unit that repeats thousands of times
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Once muscle cell unit that connects to other muscle cell units
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One bundle of myofilaments that differs from sarcommere to sarcommere
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One big thing connected to other things, making things happen
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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 the functional unit (contractile unit) of a muscle fiber. As illustrated in Figure 2-5, each sarcomere contains two types of myofilaments: thick filaments, composed primarily of the contractile protein myosin, and thin filaments, composed primarily of the contractile protein actin.
Detailed explanation-3: -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-4: -A sarcomere is the basic functional unit of any muscle. A group of sarcomere comprises a myofibril within a muscle. The thick filaments in the A band and thin filaments in the I band interact and bond together in order to cause contraction and shortening of the muscle fiber.