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voluntary, skeletal muscle tissue
striated muscle
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found in digestive tract and blood vessels
smooth muscle
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found only in the heart
cardiac muscle
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layers of fibrous connective tussue that separate adjacent skeletal muscles from each other
fascia
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connective tissue that holds a muscle to a bone
tendon
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a broad, flat tendon
aponeurosis
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layer of dense irregular fibrous tissue that surround the whole muscle
epimysium
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layer of fibrous connective tissue that surrounds each fascicle
perimysium
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a fine sheath of connective tissue that surrounds each muscle fiber in each fascicle
endomysium
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threadlike filaments of proteins actin and myosin; the contractile elements of skeletal muscle cells
myofibrils
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the membrane of a muscle cell
sarcolemma
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similar to cytoplasm of other cells but with more amounts of glycosomes
sarcoplasm
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thin protein filaments that help compose myofibril
actin
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thick protein filament that help compose myofibril
myosin
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nerve fiber that connects to a group of muscle cells
motor neuron
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connection between the nerve fiber (motor neuron) and the muscle fiber
neuromuscular junction
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neurotransmitter
acetylcholine
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specialized portion of the muscle fiber membrane of the neuromuscular junction
motor end plate
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the motor neuron and the muscle fibers that it contains
motor unit
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the gap between the neuron and the motor end plate of the muscle fiber
synaptic cleft
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store neurotransmitters
synaptic vesicles
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segment of the myofibril between 2 successive "Z" lines
sarcomere
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area where the actin filaments of 2 successive sarcomeres attach to each other
Z line
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composed of thick myosin filaments; appear as wide, dark stripes when under a microscope
A band
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contain thinner actin filaments where they dont overlap the myosin filaments
I band
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part of the myosin filaments; they generate tension between the actin and myosin filaments
cross bridges
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muscles that move with conscious thought
voluntary muscles
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muscles that move without conscious thought
involuntary muscles
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drawing away from the median axis
abduction
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drawing toward the median axis
adduction
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stretching outward
extension
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a rotation of the hand and radius around the ulna so that the palm is turned upward
supination
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a rotation of the hand and radius around the ulna so that the palm is turned downward
pronation
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a turning outward
eversion
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a turning inward
inversion
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a muscles place of attachment on a fixed, or immovable bone
origin
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a muscles place of attachment on a movable bone
insertion
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a muscle that provides the major force producing a specific movement
prime mover
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muscles that oppose or reverse a particular movement
antagonists
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muscles that help prime movers by adding a little extra force to the same movement
synergists
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the result of the muscle contraction
action
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