select the correct answer. a skeletal muscle is a composition of several components bundled one into the…
select the correct answer. a skeletal muscle is a composition of several components bundled one into the other. at which structural level in the muscle does contraction occur to bring about contraction in the whole muscle? a. myofibril b. muscle fiber c. myoneural junction d. tendon e. fascicle
Answer
Brief Explanations:
Muscle contraction at the microscopic level occurs in myofibrils. Myofibrils contain sarcomeres which are the basic contractile units. Contraction of myofibrils leads to contraction of muscle fibers, fascicles, and ultimately the whole muscle. Muscle fibers are bundles of myofibrils, myoneural junctions are sites of nerve - muscle communication, tendons attach muscle to bone, and fascicles are bundles of muscle fibers.
Answer:
A. myofibril