The Smallest Unit of a Skeletal Muscle That Shortens During

Question

The smallest unit of a skeletal muscle that shortens during a muscle contraction is the
A) myosin molecule.
B) thin filament.
C) sarcomere.
D) myofibril.

Accepted Answer

The sarcomere is the smallest functional unit of a skeletal muscle that shortens during contraction. It is the segment between two neighboring Z-lines and contains the actin and myosin filaments that slide past each other to produce muscle contraction.