Titin is the largest protein in the body; it runs the full length of the sarcomere from Z line to Z line. Each titin molecule runs right through a myosin bundle. Between the ends of the myosin bundles and the Z lines, titin molecules are very stretchable, like bungee cords.

Which feature characterizes slow-twitch skeletal muscle fibers?

Oxidative fibers rely on aerobic respiration to fuel muscle contractions, and include slow-twitch fibers, which are characterized as muscles with long contraction duration, associated with endurance.

Which feature creates the striated appearance of skeletal muscles?

The striated appearance of skeletal muscle tissue is a result of repeating bands of the proteins actin and myosin that are present along the length of myofibrils. Dark A bands and light I bands repeat along myofibrils, and the alignment of myofibrils in the cell causes the entire cell to appear striated or banded.