AP BIOLOGY

Detailed explanation-1: -ATP is replenished by using phosphocreatine to convert adenosine diphosphate (ADP) into ATP in the mitochondria of cells within the muscle tissue. ATP is therefore produced from glucose (carbohydrates) through the glycolytic pathway.

Detailed explanation-2: -Source of Fuel – The alactacid energy system or ATP/PC (Adenosine Tri-Phosphate/Phospho-Creatine) energy system uses the ATP that is immediately available within the muscle cell (myocyte).

Detailed explanation-3: -Phosphocreatine. The muscles of the body function through the use of ATP, or adenosine triphosphate, to power contractions. When one molecule of ATP is used in the contraction process, it is hydrolyzed to ADP, adenosine diphosphate, and an inorganic phosphate.

Detailed explanation-4: -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-5: -1) the Phosphagen system which uses phosphocreatine (PCr) and can generally be thought of as our high-octane rocket fuel, due to its ability to synthesize ATP the fastest.