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Obesity is a chronic and increasingly prevalent disease in the United States, with children, adolescents and adults all at risk. Mitochondrial dysfunction is thought to be a potential cause of obesity; however, the relationship between mitochondrial function and obesity remains unclear. Obesity leads to many related diseases such as diabetes, heart disease, stroke, and certain cancers. As such, it is imperative that mitochondrial dysfunction be explored as an underlying cause of obesity-related pathologies. What are Mitochondria? Most eukaryotic species have mitochondria, which are organelles that are present in their cells. They are often referred to as the “powerhouse of the cell” because they are responsible for producing the majority of the cell’s ATP (adenosine triphosphate). Numerous biological activities are powered by the chemical ATP. Mitochondria have a double-membraned structure. The outer membrane is smooth, while the inner membrane is folded into cristae. The intermembrane space is the area between the two membranes. The inner membrane is where most of the oxidative phosphorylation reactions take place. These reactions generate ATP from ADP (adenosine diphosphate) and Pi (inorganic phosphate). The mitochondrion has its own DNA, which is separate from the nuclear DNA of the cell. This DNA encodes for a small number of proteins that are essential for mitochondrial function. One of these proteins, cytochrome c, plays an important role in electron transport and ATP production. Why is it Important to Mitochondrial Function? Mitochondrial function is important for many reasons. One reason is that mitochondria are responsible for producing energy in the form of ATP. ATP is used by cells to power many of their functions, including muscle contraction, cell division, and ion transport. Without ATP, these processes would either not occur or would occur very slowly. Another reason why mitochondrial function is so important is that mitochondria are involved in regulating cell death. When a cell becomes damaged beyond repair, mitochondria can release molecules that trigger apoptosis, or programmed cell death. This prevents the cell from continuing to function improperly and potentially causing harm to other cells nearby. Finally, mitochondrial function is important because mitochondrial DNA (mtDNA) is unique among cellular DNA. Unlike nuclear DNA, which is inherited equally from both parents, mtDNA is only inherited from the mother. This makes it an important tool for tracing maternal lineages and for studying human evolution. Does The Mitochondria Impact Obesity? Yes, the mitochondrial impact can obesity. Theoretically, if dysfunctional mitochondria are unable…