Term
| Who ahas greater amounts of muscle tissue, men or women-what are they average percentages for each |
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Definition
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Term
| Does muscle tissue aid in the involvment of movement with the skeleton |
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Definition
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Term
| what is the terminology for muscle |
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Definition
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Term
| what is the terminology for flesh |
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Definition
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Term
| what is the terminology for husk |
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Definition
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Term
| what are the functional characteristics of muscle tissue |
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Definition
| multiple functions: excitable, contractile, extensible, elastic |
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Term
| what are the muscle functions for the body |
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Definition
| providing movement, maintaining posture, stabilize joints & generate body heat |
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Term
| Intact muscle is structurally organized into bundles that are seperated by connective tissue sheaths, what is the CT sheaths main purpose |
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Definition
| support & reinforce muscle to prevent "bursting" during strong contractions |
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Term
| Explain the gross anatomy of a single muscle fiber-to a fascicle bundle-to a muscle |
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Definition
| single muscle fibers are bundled together to form a fascicle, between each of the single muscle fibers is endomysium. Each fascicle is wrapped by perimysium. These fascicles are then bundled together and are wrapped by epimysium |
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Term
| What is the gross to microscopic anatomy of the muscle |
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Definition
| muscle, fascicles, muscle fibers, myofibrils, & thick and thin filaments |
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Term
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Definition
| fascia is the lining that covers the entire muscle |
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Term
| explain what the epimysium is |
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Definition
| the epimysium wraps each of the fascicle bundles |
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Term
| explain what the perimysium is |
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Definition
| the perimysium is the lining that wraps each fascicle |
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Term
| explain what the endomysium is |
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Definition
| the endomysium is the lining between each of the individual muscle fibers |
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Term
| is each muscle innervated |
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Definition
| each muscle is innervated by one nerve, one artery & at least one vein |
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Term
| Explain how skeletal muscles attach to the body |
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Definition
| The skeletal muscle will attach to bone, cartilage or other muscles in at least two places: the origin (anchoring site) and the insertion area (to movable bone) |
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Term
| what is direct attachment of skeletal muscle |
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Definition
| when the epimysium fuses directly to the perichondrium or the periosteum |
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Term
| what is indirect attachment of skeletal muscle |
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Definition
| when skeletal muscle is anchored through tendons or aponeuroses |
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Term
| each multinucleated muscle fiber is surrounded by |
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Definition
| sarcolemma & contains sarcoplasm within them |
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Term
| what does the sarcoplasm contain |
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Definition
| it contains large amounts of glycoproteins, myoglobin (re, oxygen-storing pigments), myofirils & specialized sarcoplasmic reticulum |
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Term
| what does the sarcoplasmic reticulum do |
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Definition
| stores calcium like the smooth endoplasmic reticulum does |
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Term
| within each myofibril there are multiple components, what are they |
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Definition
| thin filaments which are actin, thick filaments which are myosin, Z discs, H zones |
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Term
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Definition
| is one i band to a second i band (This is from one Z disc to another Z disc) |
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Term
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Definition
| contains the thin actin, thick myosin, and H zone |
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Term
| Each muscle cell has multiple myofibrils, around each myfibril is what |
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Definition
| smooth sarcoplasmic reticulum |
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Term
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Definition
| composed of thin actin filaments |
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Term
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Definition
| composed of thick myosin filaments |
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Term
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Definition
| the H zone is where neither actin nor myosin filaments overlap |
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Term
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Definition
| within I bands that consist of proteins that hold actin filaments in place |
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Term
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Definition
| In A bands, consists of proteins that hold myosin filaments in place |
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Term
| Explain the structure of myofilaments |
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Definition
myofilaments are thick filaments composed of myosin
each myosin molecule has two heads and a tail, with an ATP binding site |
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Term
| How are myofilaments: thin filaments arranged |
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Definition
| myfilaments: thin filaments are arranged into two helical actin strands, troponin, and tropomyosin |
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Term
| what does the tropomyosin strand do |
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Definition
| it helps stiffen actin core, and blocks actin's myosin binding sites at rest |
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Term
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Definition
this is a 3-polypeptide complex
-TnI: inhibitory subunit, binds to actin
-TnT: binds to tropomyosin, helps position it on actin
-TnC: binds calcium ions |
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