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