1. Quelle est la structure hiérarchique correcte du muscle squelettique ?
2. Quelle est la taille approximative d’un sarcomère, l’unité contractile du muscle squelettique?
3. Quel est le rôle principal du sarcomère dans la contraction musculaire ?
Organisation musculaire — niveaux ?
Muscle, faisceaux, fibres, myofibrilles, filaments
Fibre musculaire — définition?
Cellule multinucléée, unité contractile.
Sarcomère — taille ?
2 μm
Cycle de contraction — nécessite?
Hydrolyse d’ATP.
Cycle de contraction — mécanisme ?
Glissement actine-myosine, ATP hydrolysé
Types de fibres — différence?
Oxydatives, intermédiaires, glycolytique.
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