Skeletal muscle fibres can change from high activity, in which a high amount of ATP is used to a low level of activity, with only a small amount being used. The ATP in the muscle fibres is enough to allow muscle contractions for a few seconds. When muscle contraction continues more ATP is needed. The three ways the body can produce ATP is through creatine phosphate, aerobic glycolysis, and aerobic respiration.
Creatine phosphate When muscle fibers are relaxed, the amount of ATP produced is more then what the body would need. This excess ATP synthesize creatine phosphate, this is found in muscle fibers. An enzyme known as creatine kinase transfers ATP to creatine phosphate. Creatine is amino acid, which is synthesized in the kidneys, the
Creatine phosphate When muscle fibers are relaxed, the amount of ATP produced is more then what the body would need. This excess ATP synthesize creatine phosphate, this is found in muscle fibers. An enzyme known as creatine kinase transfers ATP to creatine phosphate. Creatine is amino acid, which is synthesized in the kidneys, the