KINE 2011 Lecture Notes - Lecture 14: Troponin, Titin, Myocyte
17 Sep 2017
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Document Summary
Myofibre is one single, cylindrical, relatively large and elongated, multinucleated cell. Formed from fusion of many undifferentiated and multinucleated cells called myoblasts. Satellite (undifferentiated) cells form new fibres after injury. A muscle is composed of many muscle fibres. (more like your baby muscle cells). Under certain conditions, they can start to differentiate into muscle cells. These are what form new cells after an injury. Muscle is a bundle of these cells, held together in a very particular way, in bundles. Perimysium groups muscle fibres into bundles (connective tissue to help keep it together) Endomysium surrounds each individual muscle fibre ( Epimysium surrounds entire muscle (connective tissue to help keep it together). Projection of this are connected to collagen fibres. Final out layer is connected to the tendon, that then anchors that muscle to your bone. Muscle refers to the big bundle, but the muscle fibre is just one cell. Contraction - the muscle fibres individually is what is contracting.
