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muscle structures
16 cards·by m4gicmike69
Epmysium
Surrounds skeletal muscle and all fascicles in a muscle
Perimysium
Seperates muscle into small compartments and surrounds fascicles
Endomysium
Surrounds individual muscle fibers
Sarcolemma
Cell membrane of a muscle cell
Sarcoplasm
Cytoplasm of a muscle fiber(cell)
Myofibril
Threads of protein inside the sarcoplasm
Myosin
Thick protein filament inside myofibril
Actin
Thin protein filament inside myofibril
I band
actin filament attached to z-lines
Z line
Protein to which actin binds to
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 between motor neuron and muscle fiber
Neurotransmitters
Chemicals that go from neuron to muscle fibers
Motor Unit
consist of motor neuron and muscle fiber