BIOD27H3 Study Guide - Endoplasmic Reticulum, Myocyte, Myosin Head
27 Jun 2011
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Cardiac muscle: only found in the heart, moves blood through circulatory system, multiple levels of control, primary extrinsic control arises from autonomic nervous system (ans, some can contract spontaneously i. e without signals from cns. Point of muscle bone attachment closest to the trunk. The point of muscle bone attachment more distal (distant) from the trunk. Flexor and extensor muscles www. notesolution. com: flexor muscles: brings bones closer together e. g bicep, extensor muscles: moves bones away from each other e. g tricep, most joints have pairs of muscles: 1 flexor, 1 extensor, antagonistic muscle groups: Components of muscle fibres: muscle fibre: comprised of myofibrils, which contain thick and thin filaments. The contractile machinery of the muscle: sarcolemma = cell membrane, transverse tubules (t-tubules) = invaginations of the sarcolemma, sarcoplasm = cytoplasm (contains mitochondria and glycogen for muscle contraction) Releases ca during muscle contraction: mitochondria : provides atp for muscle contraction.
