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A Biochemical PathwayHow Diffusion WorksElectron Transport System and ATP SynthesisElectron Transport SystemEndocytosis and ExocytosisHow Enzymes WorkThe Sodium-Potassium Exchange PumpHow Facilitated Diffusion WorksFeedback Inhibition of Biochemical PathwaysHow Glycolysis WorksOverview of the Krebs CycleLysosomesHow the NAD+ WorksHow Osmosis WorksProton Pump