Khan Academy
Khan Academy: Steps of Cellular Respiration
Resource walks you through the four major stages of cellular respiration which include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation and traces how they connect up to one another.
Khan Academy
Khan Academy: Regulation of Cellular Respiration
This article investigates how cellular respiration can be sped up or slowed down in response to ATP levels and other metabolic signals.