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Muscular System
Responsible for the movement in the human body.
16 cards·by Cjunior7
Epimysium
Surrounds skeletal muscle & all fascicles in a muscle.
Perimysium
Surrounds indivisual fascicles and seperates muscle into small compartments.
Endomysium
Surrounds indivisual muscle fibers.
Sacrolemma
Cell membrane of a muscle fiber.
sacroplasm
Cytoplasm of a muscle fiber.
myofibril
Threads of protein inside the sacroplasm.
myosin
Thick protein filaments inside a myofibril
Actin
Thin protein filaments inside a myofibril.
I band
actin filaments attached to z- lines
Z line
protein 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
neuromuscular junction
connective between motor neuron & muscle fiber.
neurotransmitters
chemical that goes from neuron to muscle fiber
motor unit
consist of motor neuron and a muscle fiber