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muscle structures
16 cards·by dacoolkid69
Epimysium
Surrounds skeltal muscle and all fascicles in a muscle
Perimysium
Surrounds individual fascicles and seperates msucle into small compartments
Endomysium
surround individual muscle fibers
Sarcolemma
cell membrane of a muscle fiber
Sarcoplasm
cytoplasm of a muscle fiber
myofibril
threads of a protein inside the sacroplasm
Myosin
thick protein inside a myofibril
actin
thin protein filament inside a myofibril
I band
actin filaments attached to z-lines
z line
protien in which actin binds
A band
region where myosin overlaps actin
Sarcomere
unit of a muscle from z-line to z-line
motor neuron
nerve cell connects to muscle fiber
neuromuscular jucntion
connection between motor neuron and muscle fiber
neurotransmitters
chemicals that go from neuron to muscle fiber
motor unit
consits of a motor neuron and a muscle fiber