Creatine phosphate serves a crucial role in muscle cells by c) storing energy that will be transferred to ADP to resynthesize ATP. When muscles undergo intense activity, they require quick bursts of energy. ATP (adenosine triphosphate) is the primary energy currency of the cell, but its stores are limited and can be depleted rapidly during strenuous exercise.
Creatine phosphate acts as a rapidly mobilizable reserve of high-energy phosphates in muscle cells. When ATP levels drop, creatine phosphate donates its high-energy phosphate group to ADP (adenosine diphosphate), converting it back into ATP. This process is facilitated by the enzyme creatine kinase and allows for a swift replenishment of ATP, enabling continued muscle contraction and performance during high-intensity exercise.
In summary, the primary function of creatine phosphate in muscle cells is to act as a quick source of energy by resynthesizing ATP, which is vital for sustaining muscular activity.