Submitted by Anonymous (not verified) on Wed, 08/02/2017 - 14:51
There are three energy systems used for muscle contraction. The first is the ATP-PC system. Adenosine Triphosphate (ATP) is used to supply energy that allows muscle fibers to shorten or contract. ATP cleaves a high-energy phosphate bond and using the sliding filament theory produces muscle contraction. Adenosine triphosphate (ATP) becomes adenosine diphosphate (ADP) and a phoshate group. The PC is phosphocreatine. Phosphocreatine shuttles the phosphate group back to ADP to replenish ATP.
