Muscle Flashcards
what are the 3 types of muscle?
skeletal, cardiac, smooth
this type of muscle is striated, voluntary, and attached to bone
skeletal
this type of muscle of striated, involuntary, and in the heart
cardiac
this type of muscle is not striated, involutory, and lines hollow organs
smooth
as muscles contract, _____ is generated and this is thermogenesis
heat
motor neurons are found in ____ matter of the spinal cord
gray
what connects muscle to bone?
tendon
______ is a bundle of muscle fascicles
muscle
____ _____ are a bundle of muscle fibers/cells
muscle fascicle
_____ are a contractile assemble of proteins in a muscle cell
myofibrils
_____ are contracting subunits that make up myofibrils
sarcomere
___ _____ is the intracellular storehouse of calcium ions
sarcoplasmic reticulum
____ ____ are a network of tubular passages within striated muscle that are an extension of the plasma membrane
transverse tubules
____ is the primary protein of thin filament
actin
_____ is the primary protein of thick filament
myosin
myosin is driven by ___ to allow for muscle contraction
ATP
____ blocks myosin binding sites on thin filament during relaxation
tropomyosin
there are ___ actin subunits per tropomyosin molecule
7
____ is the calcium sensor that triggers muscle contraction and locks tropomyosin in place when the muscle is relaxed
troponin
troponin is ____ subunits long and is on the ___ filament
3, thin
____ is a spring-like connector of the thick filaments to the Z disc
titin
__-_____ is the primary structural protein of the Z-disc
alpha-actinin
______ is the primary structural proteins of the M-line
myomesin
____ connects the Z- disc to the membrane cytoskeleton and is associated with muscular dystrophy
dystrophin