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raises the eyebrows occipitofrontalis
closes the eyelids orbicularis oculi
puckers the lips orbicularis oris
flattens the cheeks buccinator
what are the kissing muscles orbicularis oris and buccinator
smiling muscle zygomaticus
sneering levator labii superioris
frowning depressor anguli oris
what are the 4 pairs of mastication muscles 2 pair of pterygoids, temporalis, and masseter
changes the shape of the tongue intrinsic tongue muscles
move the tongue extrinsic tongue muscles
neck muscle sternocleidomastoid
sheetlike muscle that covers the anterolateral neck platysma
group of muscles on each side of the back erector spinae
elevate the ribs during inspiration external intercostals
contract during forced expiration internal intercostals
accomplishes quiet breathing diaphragm
one muscle that plays the major role in accomplishing a desired movement prime mover
muscles that work in opposition antagonists
muscles that work togeather to accomplish specific movements synergists
without oxygen anaerobic respiration
with oxygen aerobic respiration
the amount of oxygen needed in chemical reactions to convert lactic acid to glucose oxygen debt
results when ATP is used during muscle contraction muscle fatigue
the length of the muscle does not change {equal distance isometric
the amount of tension produced by the muscle is consistant during contraction {equal tension isotonic
tension produced by muscles of the body muscle tone
contract quickly fatigue quickly fast-twitch fibers
contract more slowly and fatigue slowly slow-twitch fibers
most stationary end of the muscle origin
end of the muscle undergoing the most movement insertion
portion of muscle between the insertion and origin belly
ATP stored in a high energy molecule creatine phosphate
the sliding of actin myofilaments past myosin myofilaments sliding filament mechanism
a contraction of an entire muscle muscle twitch
muscle will not respond to stimulus until the stimulus reaches the level called threshold
the point at which the muscle fiber will cantract maximally all-or-none response
the time between application of a stimulus to a motor neuron lag phase
time of contraction contraction phase
time at which the muscle relaxes relaxation phase
where the muscle remains cantracted without relaxing tetany
the increase in number of motor units being activated is recruitment
to shorten with force contractability
to respond to a stimulus excitability
ability to be strached extensibility
ability to recoil back to original length after being streached elasticity
connective tissue sheath that surrounds the skeletal muscle epimysium
lacated outside the epimysium fascia
aa threadlike structure that extends from one end of the fiber to the other myofibrils
thin myofilaments actin myofilaments
thick myofilaments myosin myofilaments
highly ordered units of actin and myosin myofilaments sarcomeres
adducts and flexis humerus pectoralis major
flexis vertebral column rectus bdominus
flexis and rotates vertebral column external oblique
flexes elbow and supinates forearm biceps brachii
abducts arm deltoid
flexis thigh on hip sartorius
extends to toes and dorsiflexes foot extensor digitorum
extends neck and adducts scapula trapezius
Created by: cookimnstrchris