AP BIOLOGY

Detailed explanation-1: -Introduction. Creatine phosphate (CP) (figure 1), the phosphorylated form of the amino acid creatine, is a high-energy compound that is able to donate a phosphate to adenosine diphosphate (ADP) to make adenosine triphosphate (ATP) in muscle.

Detailed explanation-2: -Creatine phosphate (creatine-P) serves as an “energy buffer” in muscle. (A buffer is a chemical that maintains a near-constant pH in a solution or fluid, even when acid or base is added.)

Detailed explanation-3: -Phosphocreatine, also known as creatine phosphate (CP) or PCr (Pcr), is a phosphorylated form of creatine that serves as a rapidly mobilizable reserve of high-energy phosphates in skeletal muscle, myocardium and the brain to recycle adenosine triphosphate, the energy currency of the cell.

Detailed explanation-4: -In the process of regeneration of ATP, creatine phosphate transfers a high-energy phosphate to ADP. The products of this reaction are ATP and creatine. Creatine phosphate can be obtained from two sources: ingestion of meat and internal production by the liver and kidneys.

Detailed explanation-5: -Creatine is transported into the muscle cell by a specific transporter, resulting in increased intracellular creatine and PCr. The PCr is capable of acting as an energy buffer, protecting the adenosine triphosphate (ATP) concentration. Maintaining muscle nucleotides therefore enhances exercise performance and recovery.