Myofibrils in a muscle cell are made up of a repeating linear array of contractile units called ________.
A)sarcocytes
B)blastomeres
C)myomeres
D)sarcomeres
E)myotubules

Question

Quizplus · Accepted Answer

Myofibrils in a muscle cell are composed of sarcomeres, which are the basic functional units of contraction. Sarcomeres are composed of thick and thin filaments that slide past each other during muscle contraction, producing the force required for movement.

Myofibrils in a Muscle Cell Are Made Up of a Repeating