Myofibrils Are

Multiple Choice

Myofibrils are

A) Single filament systems that can interact to produce force
B) Equivalent of muscle cells with a cell membrane that surrounds the myofibrils
C) Chain of mitochondria between the contractile elements
D) Bundles of myofilaments within the muscle fiber
E) Cytoskeletal matrix that joins the contractile elements to the extracellular matrix