Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The ability of the skeletal muscles to shorten with force. | Contractility
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| Each muscle is surrounded by a connective tissue sheath called_________ | Epimysium
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| Myofibrils consist of 2 major kinds of protien fibers: ________ & ________ | Actin Myofilaments & Myosin Myofilaments
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| These muscles raise the eyebrows | Occipiofrontalis
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| Nerve cells that carry action potentials to skeletal muscle fibers | Motor Neurons
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| The acetylcholine released into the synaptic cleft between the neuron and the muscle cell is rapidly broken down by an enzyme | Acetylcholinesterase
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| Neede for energy for muscle contraction | ATP
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| Is a contraction of an entire muscle | Muscle Twitch
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| Muscle cells | Muscle fibers
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| Results when ATP is used during muscle contraction faster then it can be produced in the muscles. | Muscle Fatigue
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| The constant tension produced by muscles of the body for a long period of time. | Muscle Tone
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| The most stationary end of the muscle | Origin
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| Move the vertebral column | Trunk Muscle
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| Flexes the vertebral column | Rectus abdominis
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| Muscles that work together to accomplish specific movements | Synergists
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| The basic structural and function unity of the muscle made up of actin and myosin myofliamnets | Sacromere
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| The length of the muscle does not change, but the amount of tension increases during the contraction. | Isometric
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| Characteristics of the skeletal muscles | Excitability, elasticity, contractility, and extensibility
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| Connective tissue that seperates muscles and surrounds the epimysium is called_____ | Fascia
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| Extends from a Z line to the next, has a H-zone in the center, and contains overlapping actin and myosin | Sacromere
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| The condition in which a muscle remains contracted without relaxing is called_____ | Tetany
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| A high energy molecule that can be quickly used to produce ATP | creatin phosaphate
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| If someone winks at you, they are using the_______ | Orbicularis Oculi
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| Muscle responsible for elevating the ribs during respiration | External Intercostals
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| Hip Muscle | Gluteus maximus
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| An anterior thigh muscles that extends the leg | Quadriceps Femoris
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| Muscle fiber is surrounded by | Endomysin
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| 2 layers that surround the muscle | epimysin and perimysin
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| A contraction of an entire muscle in response to stimulus | muscle twitch
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| Occurs in the presence of oxygen | Areobic respiration
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| 2 muscle disorders | cramps and hypertrophy
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| muscle fibers fatigue quickly | Fast twitch
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| The most stationary end of the muscle | origin or head
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| Muscles that work together | synergists
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| Sneering is accomplished by _________ | levator labii superiois
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| Muscle Fibers that are resistant to fatigue | Slow Twitch
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| The end of the muscle attached to the bone undergoing the greatest movement | Insertion
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| Group of muscles on each side of the back | Erector Spinae
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| Flexes the vertebral column | Rectus abdominis
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| flexes, extends, and abducts the arm | deltoid
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| Single sheet-like muscle that covers the anterolateral neck | Platsyma
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| Chest muscle that abducts and flexes the arm | Pectoralis major
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| The portion of the muscle between the origin and the insertion | Belly
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| Arm attached to the thorax by | Pectoralis major and lattimus dorsii
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| Attaches humeurs to the scapula | Rotators Cuff Muscle
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| Adducts the thigh | Adductor muscle
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| Forms the bulge of the calf | Gastrocnemius and soleus
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| Lateral muscle of the leg | Peroneus
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| flexes the wrist | Flexor Carpi
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| flexes the fingers | Flexor Digitorum
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| covers flexors and extensors and holds them in place | Retinaculum
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| Extends wrist | Extensor Carpi
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| Extends fingers | Extensor digitorum
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| Branch that conncts to muscle | Neuromusclar Junction
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| A muscle fiber will not respond to stimulus until that stimulus reaches a level called________ | Threshold
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| The sliding of action and myosin myofilaments during contraction is called _______ | sliding filament mechanism
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| The increase in number of motor units being activated is called_______ | recruitment
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| A single motor neuron and all the skeletal muscle fibers it innervates | motor unit
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| The spcae between the persynpatic terminal and muscle cell | Synaptic Cleft
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| An enlarged nerve terminal | Persynaptic terminal
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