"MAPK Signaling: Oxidative Stress Pathway" refers to a specific branch of the Mitogen-Activated Protein Kinase (MAPK) signaling pathway that is activated in response to oxidative stress. Oxidative stress occurs when there is an imbalance between the production of reactive oxygen species (ROS) and the ability of cells to detoxify these harmful molecules. The MAPK pathway is a fundamental signaling cascade that transmits extracellular signals to the nucleus, regulating various cellular responses, including those related to stress and damage.