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Unformatted text preview: ventricle of the heart Skeletal Muscle: Muscle Fiber, is actually a cell. Plasma membrane = sarcolemma, cytoplasm = sarcoplasm, endoplasmic reticulum = sarcoplasmic reticulum, t-tubules. A muscle is made up of muscle cells, muscle fiber is a single muscle cell, each fuber contains many myofibrils Myofibril, muscle fibre has many myofibrils Myosin thick filament, composed of several hundred molecules of the protein myosin, each myosin molecule is shaped like a golf club....
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- Spring '08