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terri kay
head & neck muscle
| Question | Answer |
|---|---|
| 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
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