Which list of muscle components is in the correct order from smallest to largest?
A) muscle, sarcomeres, myofibrils, muscle fibers
B) sarcomeres, myofibrils, muscle fibers, muscle
C) sarcomeres, myofibrils, muscle, muscle fibers
D) myofibrils, muscle, sarcomeres, muscle fibers

Question

Quizplus · Accepted Answer

Sarcomeres are the smallest unit of muscle fibers, composed of myofilaments. Myofibrils are bundles of sarcomeres. Groups of myofibrils form muscle fibers, which are the actual functional unit of muscles. Finally, muscles are made up of many muscle fibers. Therefore, the correct order from smallest to largest is sarcomeres, myofibrils, muscle fibers, and muscle. Choice B is the only option that lists them in the correct order.

Which List of Muscle Components Is in the Correct Order