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![]() Both types of metabolism share the initial pathway of glycolysis, but aerobic metabolism continues with the Krebs cycle and oxidative phosphorylation. ![]() ![]() The products of the Krebs cycle include energy in the form of ATP (via substrate level phosphorylation ), NADH, and FADH2.Ĭ 6H 12O 6 (s) + 6 O 2 (g) → 6 CO 2 (g) + 6 H 2O (l) + heatĪ negative ΔG indicates that the reaction can occur spontaneously.Īerobic metabolism is up to 15 times more efficient than anaerobic metabolism, which yields two molecules ATP per one molecule glucose. During aerobic conditions, the pyruvate enters the mitochondrion to be fully oxidized by the Krebs cycle. During glycolysis, pyruvate is formed from glucose metabolism. Although carbohydrates, fats and proteins can be used as reactants, the preferred method is the process of glycolysis. While the overall reaction is a combustion reaction, no single reaction that comprises it is a combustion reaction.Īerobic reactions require oxygen for ATP generation. This is because it occurs in many separate steps. Although technically, cellular respiration is a combustion reaction, it does not resemble one when it occurs in a living cell. Most of these smaller reactions are redox reactions themselves. The overall reaction is broken into many smaller ones when it occurs in the body. Figure: Overview of Cellular Respiration: A diagram of cellular respiration including glycolysis, Krebs cycle (AKA citric acid cycle), and the electron transport chain.Ĭhemically, cellular respiration is considered an exothermic redox reaction. Respiration is one of the key ways a cell gains useful energy to fuel cellular activity. The reactions involved in this respiration are considered to be catabolic reactions that release energy as larger molecules are broken down into smaller ones and high-energy bonds are broken. \)Ĭellular respiration is a set of metabolic reactions and processes that take place within the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP).
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