You should know.
A sacromere
Skeletal muscle fibers contain numerous nuclei. This is used to produce large amounts of the enzymes and structural proteins needed for muscle contraction.
The Sarcomere
sarcomere
Myofibrils The sarcomere is the unit of muscular contraction.
The myofibril is the basic muscle cell, within which is the sarcomere, the basic unit of muscle contraction.
The smallest contractile unit of a muscle fiber is the sarcomere.It is composed of contractile myofilaments known as actin and myosin.
the distance from one Z line to the next
True
Skeletal muscle fibers contain numerous nuclei. This is used to produce large amounts of the enzymes and structural proteins needed for muscle contraction.
Isometric contraction
constant contraction of a muscle is called the muscle tone