understand the energy sources used by a muscle during
contraction, what the energy is used for,...
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Medical Sciences
understand the energy sources used by a muscle duringcontraction, what the energy is used for, and how it can bereplenished. Also, know the advabtages and disadvatge of eachenergy source.
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Muscles use the stored chemical energy from food we eat and convert that to heat and energy of motion kinetic energy Energy is required to enable growth and repair of tissue to maintain body temperature and to fuel physical activity Energy comes from foods rich in carbohydrate protein and fat The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate ATP the bodys biochemical way to store and transport energy ATP is a highenergy nucleotide which acts as an instant source of energy within the cell When muscles contract they break down ATP in a reaction that provides energy However muscle cells only store enough ATP to fuel a few seconds of maximal contraction Once muscle contraction starts the making of ATP must start quickly ATP production is so important muscle cells have several different ways to make it These systems work together in phases The three biochemical systems for producing ATP are in order Using creatine phosphate Using glycogen anaerobic glycolysis Using aerobic respiration aerobic glycolysis
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