-
________: chemical that diffuses across the nmj, causing excitation of the sarcolemma
acetylcholine
-
____-__-_____: all of the fibers in a muscle fire at once. there is no such thing as a motor neuron stimulus that causes some muscle fibers to contract.
all-or-none principle
-
_____ fibers: normal muscle fibers
extrafusal
-
____ twitch muscle fibers: motor unit that develops force rapidly, also relaxes rapidly and thus has a short twitch time
fast
-
____ of ____: method of grading muscle force that uses how frequently a muscle is activated
frequency of activation
-
____ ____ ____: proprioceptors located in tendons near the myotendinous junction and are in a series, that is attached end to end with extrafusal muscle fibers
golgi tendon organ
-
______- enlargement of muscle fibers
hypertrophy
-
_____ fibers: modified fibers enclosed in a sheath of connective tissue and run parallel to normal muscle fibers
intrafusal
-
_____ sense: conscious appreciation of the body in three dimensional space
kinesthetic sense
-
____ ____: a motor neuron and all the muscle fibers that it innervates; basic functional entity of muscular activity.
motor unit
-
_____ ____: proprioceptors that consist of several modified muscle fibers enclosed in a sheath of connective tissue.
muscle spindle
-
______: specialized sensory receptors located withing joints, muscles, and tendons
proprioceptors
-
______: means of achieving an increase in force by varying the number of motor units activated
recruitment
-
____-____ fiber: develop force slowly and relax slowly, and have a long twitch time
slow twitch
-
_____: max amount of force the motor unit can develop
tetanus
-
____: short period of activation of muscle fibers within the motor unit
twitch
|
|
