Muscle Cells are Made Up of ________

Question

Muscle cells are made up of ________.
A)Z bars
B)Myosin
C)Myofibrils
D)Actin

Accepted Answer

Muscle cells are made up of myofibrils, which are composed of proteins called actin and myosin. Z bars are a component of myofibrils, but not the primary building block of muscle cells.