CH 6 Anatomy Muscles
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| frontalis | cranial aponeurosis
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| orbicularis oculi | frontal bone and maxilla
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| orbicularis oris | mandible and maxilla
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| Temporalis | Temporal bone
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| zygomaticus | zygomatic bone
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| masseter | temporal bone
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| Buccinator | Maxilla and Mandible near molars
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| Sternocleidomastoid | sternum and clavicle
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| platysma | connective tissue covering the superior chest muscles
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| pectoralis major | Sternum, clavicle, and first to sixth ribs
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| rectus abdominis | pubis
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| External oblique | lower eight ribs
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| bicepts brachii | scapula of shoulder girdle
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| brachialis | distal humerous
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| ilopsoas | ilium and lumbar vertebrae
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| adductor muscles | pelvis
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| Sartorius | ilium
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| Vasti | femur
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| rectus femoris | pelvis
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| tibialis anterior | proximal tibia
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| extensor digitorum longus | proximal tibia and fibula
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| fibularis muscles | fibula
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| trapezius | occipital bone and all cervical and thoracic vertebrae
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| latissimus dorsi | lower spine and iliac crest
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| erector spinae | iliac cest, ribs 3-12, and vertebrae
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| quadratus lumborum | iliac crest, lumbar facia
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| deltoid | scapular and clavicle
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| tricepts brachii | shoulder girdle and proximal humerus
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| flexor carpi radialis | distal humerus
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| flexor carpi ulnaris | distal humerus and posterior ulna
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| flexor digitormu superficialis | distal humerus, ulna , and radius
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| extensor carpi radialis | humerus
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| extensor digitorum | distal humerus
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| gluteus maximus | sacrum and ilium
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| gluteus medius | ilium
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| hamstring muscles | ischial tuberosity
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| Gastrocnemius | distal femur
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| types of muscle | skeletal, smooth, cardiac
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| Muscle fibers | muscle cells
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| skeletal muscle | attach to skeleton
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| striated muscle | skeletal muscle
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| endomysium | surrounds each muscle fiber
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| perimysium | covers fascicle
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| fascicle | many fibers bundled together
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| epimysium | covers entire muscle
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| tendons | attach muscles to bone
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| smooth muscle | no striations, involuntary
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| cardiac muscle | found only in the heart
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| sarcolemma | many oval nuclei beneath the plasma membrane
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| myofibrils | ribbon like organells
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| I bands | actin, light band
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| A band | myosin, dark band
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| sarcomeres | chains of tiny contractile units
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| myofilaments | threadlike protein
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| thick filaments | myosin
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| cross bridges | link thick and thin myofilaments together
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| thin filaments | actin
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| sarcoplasmic reticulum | smooth endoplasmic reticulum
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| motor unit | one neuron and all the muscle cells it stimulates
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| axon | nerve fiber
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| neuromuscular junction | junction with the sarcolemma
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| when a muscle is unable to contract even though it is still being stimulated. | muscle fatigue
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| state of continuous partial contractions | muscle tone
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| flaccid | soft and flabby
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| flexion | angle of joint decreases
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| extension | angle of joint increases
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| rotation | movement around longitudinal axis
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| abduction | moving limb away from body
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| adduction | moving limb towards body
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| supination | turning backwards
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| pronation | turning forwards
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| fascicles are arranged in concentric rings | circular
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| fascicles converge toward a single insertion tendon | convergent
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| neck muscles | move head and shoulder girdle
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| trunk muscles | move vertebral column, ribs, head, arms, abdominal body wall.
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