As the names implies, the most common symptom of adrenal fatigue is unrelenting fatigue, a feeling of being run down or not able to keep up with your daily demands. And because fatigue is such a common symptom, the syndrome is very often missed or misdiagnosed by physicians.
ATP, a high energy molecule, is expended by working cells. Cellular respiration occurs in both eukaryotic and prokaryotic cells. There are three main stages of cellular respiration: glycolysis, the citric acid cycle, and electron transport/oxidative phosphorylation. Glycolysis. Glycolysis literally means splitting sugars. Glucose, a six carbon sugar, is split into two molecules of a three carbon sugar. Glycolysis takes place in the cell's cytoplasm. Glucose and oxygen are supplied to cells by the bloodstream. In the process of glyoclysis, two molecules of ATP, two molecules of pyruvic acid and two high energy electron carrying molecules of NADH are produced. Glycolysis can occur with or without oxygen. In the presence of oxygen, glycolysis is the first stage of aerobic cellular respiration. Without oxygen, glycolysis allows cells to make small amounts of ATP. This process is called anaerobic respiration or fermentation.
C6H12O6 + 6O2 -------------------> 6CO2 + 6H2O + ~38 ATP. Whereas only photosynthetic cells can make sugar using photosynthesis, ALL cells need to be able to break down sugars they take in from their environment and turn it into energy to be used in cellular work.... II. Cellular respiration can be broken down into 4 stages: