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what is skeletal muscle?
voluntary or involuntary?
attaches to what? |
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Definition
a voluntary straited muscle that usually attaches to one or more bones
composed not only of muscular tissue but also of fibrous connective tissue |
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| describe the "hierarchy of muscle tissues" |
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Definition
belly surrounded by epimysium
made of fascicles which are wrapped in perimysium
made up of muscle fibers
muscle fibers ARE the muscle cells
ALSO they are wrapped with fascia called endomysium
these are made up of myofibrils which are also made up of microfilaments |
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Term
muscle fibers are made up of___________
and surrounded by _____________ |
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Definition
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| myofibrils are made up of ___________ |
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Definition
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| proteins that myofilaments are made of |
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| most muscle repair occurs through what process? |
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Definition
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| smooth ER of a muscle fiber? |
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lighter than A ba ds
lIght |
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| in the middle of the A band, the ighter region |
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Definition
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Definition
bisects the I band
dark narro Z disk composex of protein connectin |
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Term
| each segment of myofibril from one Z disc to the next |
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Definition
| sarcomere-functional contractile unit of muscle fiber |
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| dark band formed by paralle thick filaments tha tpartly overlap the thin |
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Definition
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| a lighter region in th emiddle of an A band that contains thick filaments only |
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Definition
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| light band composed of thin filaments only |
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Definition
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| smooth muscles are of the ____ |
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Definition
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| cardiac msucles are of the ______ and have junctions called _________ ________ |
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Definition
| heart; intercalcated discs |
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Definition
size, shape, direction of fibers
location, origin and insertion
action |
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| where does a conscious wish to move a body part originate |
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Definition
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| meeting of the neuron with the muscle fibers is called the _______________ |
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| there are vesicles in the axon terminal that contain neurotransmiter |
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| composed of the occipitalis and the frontalis |
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Definition
| retracts scalp; fixes galea aponeurotica |
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Definition
| raies eyebrows and creates wrinkgles in forehead when occipitalis is contracted; draws scalp forward when occipitalis is relaxed |
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Definition
| closes eye: compresses lacrimal gland to promote flow of tears |
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| levator palpebrae superioris |
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Definition
| opens eye; raises upper eyelid |
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Definition
| closes lips; protrudes lips as in kissing; aids in speech |
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| zygomaticus major and minor |
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Definition
| draw corners of mouth laterlalya nd upwards as in smiling and laughing |
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