Chapter 9 Muscle Terms
muscle that opposes the action of another muscle
antagonist
flat, sheetlike fascia that attaches muscle to muscle or muscle to bone
aponeurosis
classified as disuse, denervation, and senile
atrophy
use it or lose it
atrophy
wasting away or decrease in the size of the muscles
atrophy
abnormal formation of fibrous tissue in muscles, preventing normal mobility
contracture
helper muscle; works with others muscles to produce the same movement
synergist
cord-like structure that attaches muscle to bone
tendon
an increase in the size of a muscle because of overuse
hypertrophy
muscle attachment to the movable bone
insertion
the muscle attachment to the movable bone
insertion
the head of this contractile protein binds to actin; forms a cross-bridge
myosin
muscle attachment to the stationary bone
origin
the muscle most responsible for most of the movement in a group of muscles; called the CHIEF MUSCLE
prime mover
series of contractile units that make up each myofibril; extends from Z line to Z line
sacromere
calcium is stored within this muscle structure
sacroplasmic reticulum (SR)
type of muscle classified as striated and voluntary
skeletal muscle
type of muscle that must be stimulated by a somatic motor nerve
skeletal muscle
a helper muscle
synergist