BIOL 103 Study Guide - Final Guide: Endoplasmic Reticulum, Myasthenia Gravis, Myosin Head
24 Jul 2016
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Document Summary
Made of polysaccharide called chitin and in some crustaceans may be strengthened with calcium and other minerals. Internal, provides support and protection, do not protect body surface. Minerals such as calcium, magnesium phosphate and carbonate supply hardening material that gives endoskeleton structure. Muscle fibe (cell): each muscle fiber is a single cell containing many nuclei. Myofibril: a single muscle fibre (cell) contains many parallel structures called myofibrils. Sarcomere: each myofibril consists of a series of sarcomeres arranged end-to-end. The sarcomere is the contractile unit of muscle. A muscle is a grouping of cells (muscle fibres) bound together by connective tissue. Skeletal muscle fibers increase in size during growth but no new fibres are formed. Glycolysis: (production of atp) can support one minute of repetitive contractions, carbohydrate only partially broken down. Oxidative phosphorylation: supplies atp for skeletal muscles undergoing one hour of sustained exercise.
