This process starts in the cellsâ cytoplasm and is completed in the mitochondria-the cellular powerhouse. In those tiny organelles, one molecule of glucose with 6 molecules of oxygen are changed into 36 molecules of ATP â the energy cells can use to get things done.
Symptoms of Severe anxiety. The list of signs and symptoms mentioned in various sources for Severe anxiety includes the 4 symptoms listed below: 1  Feeling of extreme uneasiness or apprehension. 2  Increased heart rate. 3  Sweating. 4  Unable to think clearly. 5  more information...Â».
Besides the feeling of nervousness, worry or fear, an anxiety disorder can cause fatigue, irritability, restlessness and lack of concentration. It also manifests physical symptoms, such as sweating, nausea, diarrhea, trembling, shortness of breath and rapid heartbeats.