Day 4 Notes ANSWER KEY.pdf - sciovirtual.org Muscular System Day 1 Functions of the muscular system 1 2 3 4 Producing body movement Stabilizing body

Day 4 Notes ANSWER KEY.pdf - sciovirtual.org Muscular...

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sciovirtual.org Muscular System Day 1 Functions of the muscular system 1) Producing body movement 2) Stabilizing body movement 3) Movement/storing substances in the body 4) Thermogenesis (via shivering) Properties of muscular tissue 1) Electrical excitability: ability of muscles to initiate/propagate action potentials along the sarcolemma 2) Contractility: ability of muscles to contract forcefully 3) Extensibility: ability of muscles to be stretched without getting damaged, ability of muscles to produce tension under stretched conditions (especially prevalent in smooth muscles) 4) Elasticity: ability of muscles to return to its original state/function after stretching Muscle Structure Extra notes about muscle structure - Tendon: connects muscle to bone - Deep fascia: separates different muscles - Epimysium: connective tissue that surrounds muscles - Fascicle: bundles of muscle fibers - Perimysium: connective tissue that surrounds fascicles - Muscle fiber: aka muscle cell - Endomysium: connective tissue that surrounds muscle fibers - Myofibril: contractile organ of a muscle fiber, contains sarcomeres Muscle cell
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