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Muscle Structures
Structures and Functions
16 cards·by Saraigallardo
What does the Epimysium do?
Surround skeletal muscle and all fascicles in a muscle.
What does Perimysium do?
Surrounds individual fascicles and seperates 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 muscle fiber (cell).
What are Myofibrils?
Threads of protein inside the Sarcoplasm.
What are Myosins and where are they located at?
They are thick protein filament inside a myofibril.
What is Actin and where is it located at?
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.
What are Motor Nerons?
Nerve cells that connect to muscle fiber.
Neuromuscular Junction is a...
Connection between Motor Neuron and Muscle fiber?
Neurotransmitters are...
Chemicals that go from Neuron to Muscle fibers.
Motor Unit
Consists of motor neuron and a muscle fiber.