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Muscular System
How the muscles contract, what makes them contract
16 cards·by sandraedwards
Epimysium
Surounds skeletal muscle and all fascicles in muscle.
Perimysium
Surrounds individual fascicles and separates muscle into small compartments.
Endomysium
Surrounds individual muscle fibers.
Sarcolemma
Cell membrane of a muscle fiber (cell).
Sarcoplasm
Cytoplasm of a muscle fiber (cell).
Myofibril
Threads of protien inside the sarcoplasm.
Myosin
Thick protien filiment inside a myofibril.
Actin
Thin protien filiments inside a myofibril.
I Band
Actin filiments attatched to the z-line.
Z Line
Protiens to which actin binds.
A Band
Region where myosin overlaps actin.
Sacromere
Unit of muscle from z line to z line.
Motor Neuron
Nerve cell that connects to muscle fiber.
Neuronmuscular Junction
Connection between motor neuron and muscle fiber.
Neurotransmitter
Chemicals that go from neuron to muscle fiber.
Motor Unit
Consist of moror and two muscle fibers.