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Muscle Structures
16 cards·by Gabby
What does Epimysium surround in the muscle?
The skeletal muscle & fasicle
What is the function of Perimysium?
It surrounds individual fasicles & seperates muscles into small compartments.
What surrounds individual muscle fibers?
Endomysium
What is the cell membrane of muscle fiber(cell)?
Sarcolemma
What is Sarcoplasm?
Cytoplasm of a muscle fiber(cell)
Define Myofibrils function.
Threads of protein inside the sarcoplasm
Is Myosin thick or thin protein?
Myosin is a thick protein filament inside a Myofibril
Is Actin thick or thin protein?
Actin is a thin protein filament inside a Myofibril
What is the I band?
Actin filaments attached to Z lines
Which line is a protein to which Actin binds?
The Z line
What is the region where Myosin overlaps Actin?
The A band
What is Sarcomere?
Unit of muscle from Z-line to Z-line
What is the nerve cell that connects to muscle fiber?
Motor Nueron
What is the Neuromuscular Junction?
Connection between Motor Nueron & Muscle Fiber
What are Neurotransmitters?
Chemicals that go from nueron to muscle fibers
What consists of a Motor Nueron & a Muscle Fiber?
Motor Unit