All the chemical reactions that occur in the human body are collectively referred to as
(a) Anabolism
(b) Catabolism
(c) Metabolism
(d) Homeostasis

Verified step by step guidance

1. Understand the definitions of the terms given in the options: Anabolism refers to the building up of complex molecules from simpler ones, which requires energy.
2. Catabolism is the breakdown of complex molecules into simpler ones, releasing energy in the process.
3. Metabolism is the collective term that includes all chemical reactions in the body, encompassing both anabolism and catabolism.
4. Homeostasis refers to the maintenance of a stable internal environment, not directly related to chemical reactions.
5. Therefore, identify the term that broadly covers all chemical reactions, which is metabolism.

Key Concepts

Metabolism

Metabolism encompasses all chemical reactions in the body that maintain life, including both building up and breaking down molecules. It is the sum of anabolic and catabolic processes that provide energy and synthesize necessary compounds.

Anabolism

Anabolism refers to the set of metabolic pathways that construct molecules from smaller units, requiring energy input. It is responsible for growth, repair, and the synthesis of complex molecules like proteins and nucleic acids.

Catabolism

Catabolism involves breaking down complex molecules into simpler ones, releasing energy stored in chemical bonds. This energy is then used to fuel various cellular activities and anabolic reactions.