Microscope image of mitochondria (IMAGE) Salk Institute Caption Mitochondria in the cell during metabolic stress. High increases in the number of mitochondria (red), medium increases (green), and low increases (blue). Credit Salk Institute Usage Restrictions With credit and related coverage License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.