Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP?

write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions.
what would this type of ATP production be called?

Skeletal muscles primarily make ATP through a process called aerobic respiration. This process involves the use of oxygen to break down glucose and other fuel molecules in order to generate ATP. Here is the overall reaction for this process:

C6H12O6 (glucose) + 6O2 (oxygen) --> 6CO2 (carbon dioxide) + 6H2O (water) + ATP

However, the specific reaction you mentioned (CrP + ADP --> Cr + ATP) is referring to a different form of ATP production called anaerobic respiration or ATP-PC system (adenosine triphosphate-phosphocreatine system). This process occurs during short bursts of intense exercise, such as weightlifting or sprinting, when oxygen supply cannot meet the demands of the muscles. Here is the reaction for this process:

CrP (phosphocreatine) + ADP (adenosine diphosphate) --> Cr (creatinine) + ATP

In this reaction, phosphocreatine (CrP) donates its phosphate group to adenosine diphosphate (ADP), resulting in the formation of ATP and creatinine (Cr). The breakdown of phosphocreatine provides a quick source of ATP without the need for oxygen.

Regarding the coupling of reactions, the mentioned reaction is exergonic coupled with endergonic. The breakdown of phosphocreatine (exergonic) releases energy, which is used to drive the synthesis of ATP from ADP (endergonic). The overall reaction is energetically favorable.

This type of ATP production, utilizing the ATP-PC system, is also known as phosphagen system or immediate energy system. It provides the initial burst of energy for short-term, high-intensity activities. However, the ATP-PC system has a limited capacity and cannot sustain long-term activities as efficiently as aerobic respiration.