What does catabolism refer to?

• A. Formation of new cells
• B. Process of breaking down molecules
• C. Movement of body parts
• D. Support of body structure

Answer: (B)

Catabolism refers specifically to the metabolic process in which larger molecules are broken down into smaller ones, releasing energy in the process. This breakdown is essential for maintaining the energy balance within the body and provides the necessary building blocks for various physiological functions. Catabolic processes involve the degradation of complex substances like carbohydrates, fats, and proteins, which can then be utilized by the body for energy or converted into other cellular components as needed.

Understanding catabolism is crucial in the context of overall metabolism — it complements anabolism, which is the process of building up larger molecules from smaller ones. This balance between catabolic and anabolic reactions is vital for growth, repair, and energy maintenance in living organisms.