La respiration cellulaire

The study of cellular respiration must begin with an examination of the cell’s energy molecule, glucose.

The computer animation is used to illustrate the first stage of cellular respiration, glycolysis.

As we move into the second stage of glycolysis, the glycolytic breakdown of glucose continues and culminates in the production of pyruvate.

Although glycolysis is sufficient to meet the energy needs of simple organisms, more complex organisms must rely on other sources of energy.

In this third phase of cellular respiration, the intermediate energy carriers NADH and FADH transfer their energy to ATP inside the mitochondria.

The function of muscle fibers is used as an example to illustrate the role of ATP in biological pathways.