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