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Muscular System
16 cards·by KingWilliamsz
What does epimysium do?
Surrounds skeletal muscle and all fascicles in muscle
what does perimysium do?
Surrounds individual fascicles and separates muscle into small compartments
what does endomysium do?
Surrounds individual muscle fibers
What is sarcolemma?
Cell membrane of a muscle fiber (cell)
What is sarcoplasm?
Cytoplasm of a muscle fiber (cell)
What is a myofibril?
Threads of protein in the sarcoplasm
what is myosin?
Thick protein filament inside a myofibril
What is actin?
Thin protein filament inside a myofibril
What is a I-band?
Actin filament attached to Z-line
What is a Z-line?
Protein to which actin binds
What is a A-band?
Region where myosin overlaps actin
What is sarcomere?
Unit of muscle from Z-line to Z-line
What is a Motor Neuron?
Nerve cell that connects to muscle fibers
What is a Neuromuscular Junction?
Connection between motor neuron and muscle fiber
What is a Neurotransmitter?
Chemicals that go from neuron to muscle fibers
What is a Motor unit?
Consists of motor neuron and a muscle fiber