MUSCLE PHYSIOLOGY

Detailed explanation-1: -Electron transport is the final stage of aerobic respiration. In this stage, energy from NADH and FADH2 is transferred to ATP.

Detailed explanation-2: -The oxidation of one molecule of NADH thus leads to the synthesis of three molecules of ATP, whereas the oxidation of FADH2, which enters the electron transport chain at complex II, yields only two ATP molecules.

Detailed explanation-3: -NADH and FADH2 made in the citric acid cycle (in the mitochondrial matrix) deposit their electrons into the electron transport chain at complexes I and II, respectively. This step regenerates NAD+ and FAD (the oxidized carriers) for use in the citric acid cycle.

Detailed explanation-4: -In the final step, the three NADH and one FADH2 amassed from the previous steps are used in oxidative phosphorylation, to make water and ATP. Oxidative phosphorylation has two parts: the electron transport chain (ETC) and chemiosmosis.