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Muscles
16 cards·by juanandonly
Describe epimysium.
Epimysium surrounds skeletal muscle & all fascicles in a muscle.
Describe perimysium.
Perimysium surrounds individual fascicles & seperates muscle into small compartments.
Describe endomysium.
Endomysium surround individual muscle fibers.
Describe sarcolemma.
A cell membrane of a muscle fiber (cell).
Describe sarcoplasm.
The cytoplasm of a muscle fiber (cell).
Describe myofibril.
Threads of protein inside the sarcoplasm.
Describe myosin.
Thich protein filament inside a myofibril.
Describe actin.
Actin is a thick protein filament inside a myofibril.
What is an I band?
An I band is actin filaments attached to z-lines.
What's a Z line?
A Z line is a protein to which actin binds.
Describe an A band.
An A band is a region where myosin overlaps actin.
What is a sarcomere?
A sarcomere is a unit of muscle from Z line to Z line.
Describe a motor neuron.
A motor neuron is a nerve cell that connects to muscle fiber.
What's a neuromuscular junction?
A neuromuscular junction is a connection between motor neuron and muscle fiber.
Describe a neurotransmitter.
A neurotransmitter is a chemical that goes from neuron to muscle fibers.
Explain a motor unit.
A motor unit consists of a motor neuron and a muscle fiber.