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-> mvt roulement (bas vers le haut)-> mvt glissement (haut vers bas)lors de l'élévation lat du membre sup

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SECOUSSEContraction: réponse __________ fibre musculaire à l'arrivée d'un seul ________ d'_________3 étapes:-Période de latence: arrivée PA à la jonction neuromusculaire—> production de force fibre musculaire -Temps de ________(génération tension ascendante)-Temps de _________(force descendante)Secousse provoquant un tétanos: stimulation même fibre, générant une _________ secousse _______ la fin du temps de relaxation -+ fréquence PA ->(+), + secousse rapprochées —>(+) de la _______ générée par la fibre musculaire (tétanos incomplet voire complet si fréquence des PA ________)

SARCOMÈRE Rôle: unité fonctionnelle de la __________—> unité contractile du muscle: sont ___________permet la contraction musculaire Composition schématique:Bandes claire I: isotrope Bandes sombres A: anisotropes Constitution microscopique:Filaments épais de _________ (insérés sur la ligne ____)Filaments fins d'_________(insérés sur le disque ___)*

MUSCLE STRIÉConstitution muscle: ensemble faisceaux ou fascicules enveloppé par l'___________(tissus conjonctifs DENSE)Constitution faisceau: ensemble fibres musculaires enveloppé par le ____________(tissu conjonctif LÂCHE)Constitution fibres musculaire, cell musculR= MYOCYTE: ensemble de myofibrille séparées par l'endomysium (tissu conjonctif) et enveloppé par le ___________(MEMBRANE)*-multinucléées= pls noyaux en périphérie-cytoplasme muscle= ___________Constitution myofibrilles(entouré par le réticulum sacoplasmique): enchaînement de _________*

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