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Muscular System
16 cards·by Eso
Epimysium
surrounds skeletal muscle and fascicles in a muscle
Perimysium
surrounds individual fascicle and seperates muscle into small compartments
Endomysium
surround individual muscle fibers
Sarcolemma
cell membrane of a muscle fiber (cell)
Sarcoplasm
cytoplasm of a muscle fiber (cell)
Myfibril
threads of protein inside the sacroplasm
Myosin
thick protein filament inside a myofibril
Actin
thin protein filament inside a myofibril
I band
actin filaments attached to z-line
Z line
protein to which actin binds
A band
region where myosin overlaps actin
Sarcomere
unit of muscle from Z-line to Z-line
Motor neuron
nerve cell that connects to muscle fiber
Neuromuscular junction
connection betweenmotor neuron and muscle fibers
Neurotransmitter
chemicals that go from neuron to muscle fibers
Motor unit
consists of motor neuron and a muscle fiber