Striated muscles are socalled because of a repeating pattern

Striated muscles are so-called because of a repeating pattern of light and dark bands. One repeating unit of the banding pattern is called a:

(a) myofilament.

(b) sarcofibril.

(c) sarcomere.

(d) myomere.

(e) crossbridge.

Solution

There are three types of muscles based upon the appearance of their structure. These can be striated, non-striated or pseudo-striated in nature.

A striated muscle fibre appears to have longitudinal demarcating lines in their structure. These demarcating lines are formed due to presence of repeating units of sarcomere. The sarcomeres are proteinaceous fibres which bring about contraction and relaxation by sliding movement upon each other. The appearance of dark band represents contraction and light band represents contraction.

Thus, this information suggests that choice b is the correct answer.