Term
| basic functions of all muscles |
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Definition
| excitablitiy, contractibility, extensibility, elasticity |
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Term
| functions of skeletal muscle |
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Definition
| produces movement of the skeleton, maintains posture and body position, supports soft tissue, guards orifices, maintains body temp |
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| structural organization of skeletal muscle |
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Definition
| whole muscle, muscle fascicle, muscle cell/muscle fiber |
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Term
| CT layers involved with muscle |
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Definition
| epimysium, perimysium, endomysium |
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Definition
| collagen bundles of epimysium, perimysium, and endomysium that converge to attach to bones, skin or other muscles |
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Definition
| a tendon which is flattened |
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Term
| tendons are interwoven into the ___ and ___ |
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Definition
| periosteum and matrix of bone |
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Definition
| multinucleated, striated, voluntary, satellite cells help in repair |
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| membrane of skeletal muscle tissue |
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Definition
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| cytoplasm of skeletal muscle tissue |
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Definition
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Definition
| invaginations of sarcolemma which carry electical impulses |
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Definition
| in sarcoplasm surrounded by sarcoplasmic reticulum |
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| myofilaments in repeated unit arrangements |
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| swollen parts of reticulum near t-tubules |
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| one myofibril is as long as ___ |
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Definition
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Definition
| is attached to sarcolemma at each end of cell, it contracts to shorten fiber |
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Definition
| holds tropomyosin in place |
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Definition
| strand that will connect thick filament to Z line |
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| requires calcium and ATP, attach pivot detach return |
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Term
| cross-bridge in sliding filament theory |
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Definition
| head of myosin to active site of actin |
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Term
| sliding filament theory explains __ |
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Definition
| how a muscle fiber exerts tension |
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Term
| each skeletal muscle fiber is stimulated by a ___ at a ____ |
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Definition
| nerve fiber; neuromuscular junction |
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Definition
| synaptic vesicles release acetylcholine (ACh) |
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Definition
| ACh released in synaptic terminal of nerve> ACh binds to motor end plate> electrical impulse in sarcolemma> impluse travels along t-tubules> sarcoplasmic reticulum releases Ca> cross bridge forms> contraction |
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Term
| contraction is an __ process |
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Definition
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Definition
| resting; some motor units are active causing muscles to be tense but no movement, maintains body position |
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Definition
| muscle repeated stimulated; increase in # of myofibrils; increase amount of mitochondria; tension increased |
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Definition
| muscle is not stimulated; muscle becomes smaller; muscle tone is decreased; |
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Term
| what causes muscle atrophy? |
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Definition
| disuse or lack of nerve input |
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Definition
| parallel, convergent, unipennate, bipennate, multipennate, circular |
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| point of attachment of muscle that is less movable |
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Definition
| point of attachment of muscle that is more movable |
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Definition
| arises from and inserts onto the axial skeleton |
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Term
| axial musculature makes up __% of skeletal muscle |
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Definition
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| axial musculature moves ___ assisting in ___ |
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Definition
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Definition
| stabilizes components of the appendicular skeleton |
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| groups of muscles in the axial musculature |
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Definition
| head and neck; vertebral column; abdominal wall; pelvic floor |
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Definition
| alveolar processes of maxilla and mandible |
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| blends into fibers of orbicularis oris |
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| orbicularis oris insertion |
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| orbicularis oculi insertion |
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| masseter, temporalis, pterygoid |
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| lateral pterygoid muscles |
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| maesster, temporalis, medial pterygoid, lateral pterygoid muscles |
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| superior rectus, medial recuts, inferior rectus, inferior oblique muscle |
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Definition
| orbicularis oculi, orbicularis oris, buccinator muscle |
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| sternocleidomastoid muscle |
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