Final answer:
Catabolic reactions are degradative, releasing energy by breaking down complex molecules, while anabolic reactions are synthetic, using that energy to build larger molecules necessary for growth and repair. Both are essential components of the body's metabolism.
Step-by-step explanation:
Catabolic processes are largely degradative reactions. They are responsible for breaking down complex molecules into simpler ones, releasing energy in the process. This is important as it provides the energy required for various functions within the body. Anabolic processes, on the other hand, are largely synthetic reactions. They use the energy produced by catabolic reactions to build larger and more complex molecules from smaller ones. An example of this is the synthesis of proteins from amino acids. These anabolic reactions are crucial for growth, repair, and maintenance of body structures.
Both catabolic and anabolic reactions are part of the metabolic processes that occur within the body. Metabolism encompasses all the chemical reactions necessary to maintain life and allows the body to grow, reproduce, maintain its structures, and respond to environmental changes. Taken together, these reactions ensure that the body has energy when it is needed and the building blocks necessary for cellular function.