The Smallest Functional Units of the Muscle Fibers are the ________

Question

The smallest functional units of the muscle fibers are the ________.
A) fascicles
B) sarcomeres
C) myofilaments
D) cisternae
E) neuromuscular synapses

Accepted Answer

Sarcomeres are the smallest functional units of muscle fibers, responsible for muscle contraction. They are the segments of myofibrils, composed of actin and myosin filaments, which slide past each other to produce muscle contraction.