Which phase of metabolism is responsible for breaking down complex compounds?

The phase of metabolism that is responsible for breaking down complex compounds is catabolism. This process involves the breakdown of larger molecules into smaller, more manageable units, which releases energy in the process. Catabolism is essential for cellular metabolism as it provides the energy needed for various physiological functions and processes.

In contrast, anabolism refers to the constructive phase of metabolism where smaller molecules are synthesized into larger, complex molecules, necessitating energy input. Metabolism is a broad term that encompasses both catabolic and anabolic processes, but it doesn't specifically denote one phase over the other. Homeostasis, on the other hand, is the state of stable internal conditions within the body, rather than a phase of metabolism. This further clarifies why the focus should be on catabolism when discussing the breakdown of complex compounds.