Step 1 : Introduction to the question "There are many chemical reactions that occur in the body. What broad term is used to include them all?"
...Catabolism means the breaking down of complex molecules into simpler ones, which often results in a release of energy. It is a phase of metabolism. Anabolism is the phase of metabolism in which simple substances are combined to form the complex materials of living tissue. Matabolism, with two As, does not exist.
