The presence of dark stripes in skeletal muscles is due to
A) the presence of blood vessels within the muscle fibers.
B) thickened membranes at the neuromuscular junctions.
C) variations in myelin coating of the muscle fibers.
D) overlapping segments of actin and myosin filaments.
E) alternating motor units.

Question

Quizplus · Accepted Answer

The presence of dark stripes, also known as striations, in skeletal muscles is due to overlapping segments of actin and myosin filaments. The arrangement of these filaments creates the visible bands within the muscle fibers.

The Presence of Dark Stripes in Skeletal Muscles Is Due