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terri kay

head & neck muscle

QuestionAnswer
occipitofrontalis raises the eyebrows
orbicularis oculi closes the eye lid
orbicularis oris puckers your lips
muscle cells muscle fibers
muscle responsible for smiling zygomaticus
buccinator flattens the cheeks
levator labii superioris sneering
depresser anguli oris frowning
what is mastication? chewing
what muscles are used to chew? temporalis, masseter, pterygoid
intrinsic tongue muscle change the shape
extrinsic tongue muscle move the tongue
what is contractility? the ability of skeletal muscleto shorten with force
what is excitability? the capacity of skeletal muscle to respond to a stimulus
what is extensibility? the ability to be stretched
what is elasticity? ability to recoil to their originial resting length after they have been stretched.
epimysium connective tissue that surrounds each skeletal muscle
fascia connective tissue, outside epimysium, surrounds and seperates muscles
perimysium loose connective tissue surrounding fasciculi
myofibrils threadlike structure that extends from one end of the fiber to the other
what do actin myofilaments resemble? 2 small strands of pearls twisted together
what do myosin myofilaments resemble? bundles of small golf clubs
what do lateral neck muscles do? rotate and adduct the neck
what is torticollis? a twisted neck
what is a platysma? single sheet like muscles, covers the anteriolateral neck. pulls corners of mouth down.
muscular groups that work against each other antagonist
changes shape of the tongue insintric tongue muscle
moves the tongue extrinsic tongue muscle
the ability to be stretched extensibility
ability to recoil to their original resting length after they have been stretched elasticity
the capacity of the skeletal muscle in response to a stimulus excitability
ability of skeletal muscle to shorten with force contractility
connective tissue located outside the epimysium fascia
composed of visible bundles perymysium
skeletal muscle that is surrounded by a connective tissue steath epimysium
thick myofilaments myosin myofilaments
thin myofilaments actin myofilaments
thread like structure that extends from one end of the fiber to another myofibrils
Contract quickly and fatigue quickly fast twitch fibers
group of muscles on each side of the back responsible for keeping the back straight and body erector spinea
light area that consists of actin I band
one another plays the major role in accomplishing the desired movement synergist
enlarges nerve terminals presynaptic terminal
basic structural and functional unity of the muscle sarcomeres
nerve cells that carry actin potentials to skeletal muscle fibers motor neurons
the muscle fiber will contract maximally at its threshold
sliding of actin myofiloments past myosin myofilaments during contraction sliding filament mechanism
kissing muscles obicularis oris and bucciantor
flexes, extends, and abducts the arm deltoid
single sheetlike muscle that covers the anterolateral neck platsma
prime mover of the lateral neck muscle? sternocliedomasoid
amount of tension produced by the muscle isotonic
muscle tone tension produced by the muscles of the body for long periods of time
portion between the origin and the insertion belly
points of attachment of each muscle origin and insertion
2 types of muscle contractions isometric and isotonic
contraction of a whole muscle muscle twitch
muscle fatigue results when ATP is used during muscle contraction faster than it can be used
pulls corners of the mouth downward platysma
torticollis twisted neck
what is the masseter responsibe for? chewing
anerobic respiration without oxygen
aerobic respiration with oxygen
lateral neck muscle rotates head and neck
a mastication muscle that is deep to the mandible pterygoid
the ammount of oxygen needed to convert lactic acid to glucose oxygen debt
a muscle that plays a big role in accomplishing a desired movement prime mover
insertion end of muscle undergoing greatest movement
head or origin most stationary end of the muscle
slow twitch fibes contract slowly and resist fatigue
length of muscle contraction does not change isometric
Created by: terrikay