Anatomy and Cell Biology 3309 Chapter Notes - Chapter 9: Titin, Zone (Band), Troponin T

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Ventral horn of the spinal cord are multipolar. Layer v of the cerebral cortex is also multipolar. Single or more nuclei, cells are strung together in chains. A muscle fibre in the cardiac setting is a chain of cells strung together. During development individual muscle cells fuse together to form a very large single cell that is multi nucleated and we refer to this as a syncytium. No striations, found in most of the hollow parts of the body. The fascicle is covered in loose connective tissue called the perimysium muscle fiber itself is surrounded by a plasma membrane called the sarcolemma is surrounded by more connective tissue called the endomysium. Surrounding them you have (first line) dense irregular connective tissue forming the epimysium. If you chain together a bunch of sacromeres you form a myofibril. Sarcomere is contractile unit, from z line to z line. Cells are energized through atp that comes from mitochondria and glycolysis.

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