Creatine Phosphate Atp Cp System

When atp s outermost phosphate bond is broken off adenosine diphosphate or adp is formed along with a great deal of energy.

Creatine phosphate atp cp system. Creatine phosphate comes to the rescue. The atp store in the body is small and is sufficient to allow maximal effort for about 1 to 2 seconds but there are ways of providing more atp to replace that being used during metabolism. When it is broken down a large amount of energy is released. Recall that atp is rebuilt by adding a phosphate to adp in a process called phosphorylation.

As it suggests this system is concerned with the use of the available atp pool that we have along with pcr. Phosphocreatine also known as creatine phosphate cp or pcr pcr is a phosphorylated creatine molecule 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. The creatine phosphate is used to reconstitute atp after it s broken down to release its energy. The total muscular stores of both atp and cp are small.

The atp system is made in the glucose and stored in the muscles. Atp pcr atp and creatine phosphate also called phosphocreatine or pcr for short make up the atp pcr system. Creatine phosphate cp like atp is stored in muscle cells. Pcr is broken down releasing a phosphate and energy which is then used to rebuild atp.

This system uses creatine phosphate cp and has a very rapid rate of atp production. The atp cp system involves an interaction between two molecules atp and creatine phosphate or cp within the cell. The atp then enables the muscles to exercise for longer period of time. The power of an energy system refers to the maximal rate at which the system can produce atp while the capacity of an energy system refers to the potential that system has for atp resynthesis.

This is referred to as the creatine phosphate pcr system the atp pcr system or simply the phosphagen system. Thus the amount of energy obtainable through this system is limited. The energy released is coupled to the energy requirement necessary for the resynthesis of atp. Since the body has only about three ounces of atp at any one time however it runs out of its supply rapidly.

The atp that has just been formed can then be applied to the working muscles for more energy. The phosphagen system consists of the atp store and the phosphocreatine pc also called creatine phosphate store see upper section of fig. There is another stored molecule called creatine phosphate which helps restore atp. Cp levels are elevated a triad is composed of a t tubule and two adjacent terminal cisternae of the sarcoplasmic reticulum.

These boys take quite the beating.