Phase 5: Spread of disease between humans is occurring in more than one country of one WHO region. Phase 6: Community-level outbreaks are in at least one additional country in a different WHO region from phase 5. A global pandemic is under way.
Figure %: The Electron Transport Chain. The events of the electron transport chain involve NADH and FADH, which act as electron transporters as they flow through the inner membrane space. In complex I, electrons are passed from NADH to the electron transport chain, where they flow through the remaining complexes. NADH is oxidized to NAD in this process.
What happens when electrons are passed down the electron transport chain? A. Hydrogen ions are pumped across the mitochondriaâs inner membrane producing a concentration gradient. B. The proteins that make up the electron transport chain attach the electrons to ADP molecules to form ATP. C. The electrons gain more and more energy until they are released from the mitochondrion. D. The concentrations of hydrogen ions on either side of the membrane become more balanced.