代謝 同化 異化。

代謝　同化　異化。　

同化作用（anabolism　Assimilation）
「異化作用」 (catabolism, dissimilation)

Metabolism is usually divided into two categories. Catabolic reactions yield energy, an example being the breakdown of food in cellular respiration. Anabolic reactions, on the other hand, use this energy to construct components of cells such as proteins and nucleic acids.