BIOL302 Lecture Notes - Neuromuscular Disease, Myoglobin, Myotonia
4 Oct 2013
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Highly metabolic burn a lot of fuel and energy to contract. Many mitochondria generate lots of power. Highly vascularized nutrient and oxygen supply via capillaries. Identify according to: organization, nuclei/cell morphology, contractile apparatus, junctions. Myoepithelial glands; can contract and expel secretions of exocrine glands. Myofibroblast scar tissue; contract by using smooth muscle type actin-myosin complex. These cells are then capable of speeding wound repair by contracting the edges of the wound. Pericytes blood vessels; regulate capillary blood flow, the clearance and phagocytosis of cellular debris, and the permeability of the blood brain barrier. Epimysium: layer of connective tissue, which covers the entire muscle. It is composed of dense irregular connective tissue. Perimysium: sheath of connective tissue that groups muscle fibres into bundles. Endomysium: wispy layer of areolar connective tissue that covers each individual muscle fiber. It overlies the muscle fiber"s cell membrane: the sarcolemma. Sarcolemma: cell membrane of striated muscle fibre cell. Sarcoplasm: comparable to cytoplasm, but of muscle cells.
