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21 Cards in this Set

  • Front
  • Back
long, cylindrical cells that make up skeletal muscle
fibers
skeletal muscle cells are ___nucleate
multi
plasma membrane of skeletal muscle cells
sarcolemma
nuclei are pushed peripherally by longitudinally arranged ____ which nearly fill the sarcoplasm
myofibrils
light bands along length of myofibrils
I bands
dark bands along length of myofibrils
A bands
composed of two contractile proteins; make up myofibrils
myofilaments
the two contractile proteins
myosin, actin
the contractile units of the muscle; extends from one I band to the next along the length of myofibrils
sarcomeres
Fibers>____>_____(actin and myosin)
myofibrils, myofilaments (actin and myosin)
each muscle fiber is enclosed in a delicate areolar connective tissue sheath called
endomysium
several endomysium sheathed muscle fibers are wrapped by a collagenic membrane called
perimysium
a bundle of fibers wrapped by a collagenic membranous perimysium
fascicle
a large number of fascicles are bound together by an overcoat of dense connective tissue called an ____ which sheathes the entire muscle.
epimysium
epimysia blend into the _____, still coarser sheets of dense connective tissue that bind muscles into functional groups, and into strong, cordlike _____ and sheetlike ______.
deep fascia, tendons, aponeuroses
myofilaments are organized into
myofibrils
myofibrils are organized into
muscle fibers
muscle fibers are organized into
endomysium
endomysium are organized into
perimysium
perimysium coated bundle of fibers =
fascicle
fascicles are organized into

which sheathes the entire muscle
epimysium