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Muscles. The word “striated” means striped. Skeletal muscle appears striped under a microscope. Skeletal Muscle. Skeletal Muscle Structure. Skeletal Muscle Structure. This model of the muscles uses straws to represent fibers. Green = endomysium Yellow = perimysium Blue = epimysium.
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The word “striated” means striped. Skeletal muscle appears striped under a microscope.
This model of the muscles uses straws to represent fibers. Green = endomysiumYellow = perimysiumBlue = epimysium
Cardiac Muscle • Intercalated discs
Actin myosin https://www.youtube.com/watch?v=CepeYFvqmk4 https://www.youtube.com/watch?v=YAJ-9nPSqwA
Cardiac Muscle (Ca) • Over half of the calcium which the cardiac cell uses for contraction originates from outside of the muscle cell. • During relaxation much of the calcium will be pumped out of the cell (rather than back into the endoplasmic reticulum.) • Calcium and sodium ions slowly leak through the membrane • When enough of these ions enter, contraction will occur. • The faster the ions leak into the cell, the faster the cell will contract