Human Physiology Essay – Why does muscle contraction require energy

Why does muscle contraction require energy, and where does this energy come from?

You should explain the three steps in force generation in muscle and the role of ATP in each.You should explain the neuromusclular junction, voltage-gated Ca2+ channels, acetylcholine,action potential, T-tubules, DHP receptor, ryanodine receptor, sarcoplasmic reticulum, SERCA pumps, the role of calcium in muscle contraction, troponin, tropomyosin, myosin, actin, thick filament, thin filament, sliding filament hypothesis, sarcomere, myofibril, muscle fiber, glycolysis, Krebs cycle, oxidative phosphorylation, creatine, creatine kinase, and phosphocreatine.

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Muscle contraction is an iterative process that depends heavily on the Adenosine Triphosphate (ATP) as the main fuelling agent. The endurance of the ATP is, however, short-lived, to approximates a single or two seconds, and the continuous demand for energy in the contraction process is continuously met by the Creatine Phosphate (CP), which serves as a quick source of energy for the regeneration of the ATP (Hopkins, 2006). However, the energy reserves within the CP are also limited, with……………

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