Metabolic Processes Interrelated with the Law of Entropy

Metabolism is a combination of two reactions or more notably known as a coupled reaction. It is comprised of an anabolic reaction and a catabolic reaction. The process of synthesizing  macromolecules where cell growth and development takes place is known as the anabolic reaction. If we look at an energy graph for an anabolic reaction, energy is needed in order for the reactants to become products. Therefore, anabolic reactions are endergonic and require energy. On the other hand, the process of breaking down large molecules into smaller molecules is known as the catabolic reaction. This time when we look at an energy graph for a catabolic reaction, energy is released rather than required when the reactants form into products. This results in an exergonic reaction and a release of energy. The graphs shown below compare the two types of reactions where the change in G is the energy required or released. 
One must know that since exergonic reactions are spontaneous, they drive the endergonic reaction causing the overall free energy change to be negative which obeys the second law of thermodynamics also known as the law of entropy because the overall disorder is increased. Here is an example of what happens with our bodies to further explain this concept of an increase in entropy. When we put food in our mouths, we use energy to make the food and eat it which can replicate the endergonic reaction or the anabolic reaction. On the other hand, when we excrete waste like human feces, we release energy in the form of heat. This replicates the exergonic reaction or the catabolic reaction. The difference is that excreting waste happens naturally whereas eating food requires us to do it. So even though we try to create order by feeding ourselves, disorder or chaos still increases because pooping occurs naturally and ultimately we must go through the entire process again.