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20 terms

kinesiology

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sarcomere
smallest functional unit of muscle tissue
myofibril
a series of sarcomeres
muscle fiber
muscle tissue cell
fascicle
a bundle of muscle fibers
thick filaments
myosin
thin filaments
actin
titin
protein that connects m line to z line
titin maintains
the position of the mysoin; prevents the sarcomere from being pulled apart;main component of muscle tone
muscle fiber types
type I, type IIA, type IIB
type I
slow twitch, red,built for endurance
type IIA
fast twitch, red, can be trained
type IIB
fast twitch, white, built for power
muscle spindles
lie parallel to muscle fibers, detect changes in muscle length and speed.
specialized muscle receptors
responsible for deep tendon reflexes
agonists
main muscle used to produce movement
antagonists
muscles that oppose the agonist
synergists
muscles that assist the action of the agonist
fixators
muscles that stabilize proximally to allow the agonist to worki distally
fiber type is determined by
genetics
every muscle in the body contains
all three fiber types