* Metabolism: This is the broadest term and encompasses all chemical reactions that occur within a living organism. It includes both anabolism and catabolism.
* Cellular metabolism: This term specifically focuses on the chemical reactions happening within cells.
* Metabolic pathways: These are sequences of chemical reactions that occur within the cell, often involving enzymes to catalyze each step.
* Anabolism: This refers to the synthesis of complex molecules from simpler ones, requiring energy input.
* Catabolism: This refers to the breakdown of complex molecules into simpler ones, releasing energy.
Therefore, all these terms are relevant to describing the chemical reactions happening within a cell. Metabolism is the most general term, encompassing both building up and breaking down processes, while cellular metabolism emphasizes that these reactions are happening within a cell. Metabolic pathways are the specific sets of reactions, and anabolism and catabolism describe the direction of the reactions.
