Bundles of skeletal muscle fibers are called
A) myofibrils.
B) myofilaments.
C) fascicles.
D) myosin.
E) sarcomeres.

Question

Quizplus · Accepted Answer

Bundles of skeletal muscle fibers are called fascicles. Myofibrils are long, cylindrical structures within muscle fibers that contain sarcomeres, the functional units of muscle contraction. Myofilaments are protein filaments within sarcomeres that slide past each other to cause muscle contraction. Myosin is a protein that makes up thick filaments within myofibrils. Sarcomeres are the repeating units along the length of a myofibril that contain myofilaments.

Bundles of Skeletal Muscle Fibers Are Called