LIFE SCIENCE

Detailed explanation-1: -Phosphocreatine can anaerobically donate a phosphate group to ADP to form ATP during the first five to eight seconds of a maximal muscular effort. Conversely, excess ATP can be used during a period of low effort to convert creatine back to phosphocreatine.

Detailed explanation-2: -The ATP–creatine phosphate system transfers a high-energy phosphate from creatine phosphate to adenosine diphosphate (ADP) to regenerate ATP. This anaerobic system can provide ATP for approximately 30 seconds for activities such as sprinting and weightlifting.

Detailed explanation-3: -The immediate energy system works by converting creatine phosphate (CP) into ATP. The CP is stored in muscle and there is enough to power up to 10 seconds of intense physical activity. Periods of rest allow for replenishment of this energy system.

Detailed explanation-4: -Phosphocreatine is a naturally occuring substance that is found predominantly in the skeletal muscles of vertebrates. Its primary utility within the body is to serve in the maintanence and recycling of adenosine triphosphate (ATP) for muscular activity like contractions.