these changes in fluorescence are related to changes in the nadh concentration in the nerve resulting from : ( a ) the splitting of atp during sodium extrusion ; ( b ) the initial binding of sodium to the sodium- and potassium-dependent atpase , which is the sodium pump ; ( c ) the stimulation of mitochondrial respiration by calcium that has entered during the spike ;
C0001473
atpase
C0001479
sodium pump