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muscle vocab
muscle vocabulary
16 cards·by ajku1234
epimysium
surrounds skeletal muscle and fascicles
perimysium
surrounds individual fascicles and seperates them into smaller groups
Endomysium
surround individual muscle fibers
Sarcolemma
cell membrane of a muscle fiber
Sarcoplasm
cytoplasm of a muscle fiber
Myofibril
threads of protein inside the sarcoplasm
Myosin
thick protein filament inside a myofibril
Actin
thin protein filament 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
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
consists of motor neuron and a muscle fiber