Muscular System (Skeletal Muscle) Flashcards
connective tissue that surrounds each skeletal muscle
epimysium
divides each skeletal muscle to fascicles (muscle fibers)
perimysium
separates the individual muscle fibers within each fascicle
endomysium
cell membrane of muscle fibers
sacrolemma
inward fold of sacrolemma
carry electrical impulses into the center of muscle fiber
transverse tubules
specialized smooth endoplasmic reticulum (produces calcium)
sacroplasmic reticulum
long threadlike structures that extend the entire length of the muscle fiber
myofibrils
makes up the myofibrils
contains the actin and myosin
myofilaments
actin
thin filaments
myosin
thick filaments
smallest portion of a muscle that can contract
sacromeres
what composes the actin myofilaments
tropomyosin
tropopin
form a stationary anchor for actin myofilaments
z disks