Which statement about skeletal muscle fibers is true?
A) Each muscle fiber is composed of many cells.
B) Each muscle fiber is composed of globular proteins.
C) Each muscle fiber contains one sarcomere.
D) Each muscle fiber contains actin and myosin.

Question

Quizplus · Accepted Answer

Skeletal muscle fibers contain actin and myosin, which are the two main proteins involved in muscle contraction. A is incorrect because skeletal muscle fibers are single, multinucleated cells. B is incorrect because skeletal muscle fibers contain various types of proteins, including actin, myosin, and others. C is incorrect because each muscle fiber contains many sarcomeres, which are the basic units of myofibrils.

Which Statement About Skeletal Muscle Fibers Is True