This presentation serves as an introduction to a learning module on metabolism.
The goal of this learning module is to introduce you to the metabolism of carbohydrates, lipids, and proteins. In this unit you will learn the purpose, major pathways and strategies, sites, reactants, and products of metabolism. Metabolism refers to the chemical reactions occurring in the body that break down or build up molecules. ATP is referred to as the energy currency of the cell. ATP transports chemical energy within cells for metabolism.
Metabolism can be considered in two parts: catabolism and anabolism. Catabolism refers to the chemical reactions in which larger molecules are broken down into smaller molecules called metabolites. These reactions generate energy. Anabolism refers to the chemical reactions in which metabolites combine to form larger molecules. These reactions require energy. In the body, catabolic and anabolic reactions are coupled so that the energy released in catabolism is used to drive an anabolic reaction.
You have learned that the nucleic acids DNA and RNA are composed of nucleotides. Nucleotides are also found in the coenzymes involved in metabolism. In this module, you will learn details about the metabolically relevant nucleotides.
Degradation of food molecules begins with digestion. In this module you will learn details about the digestion of carbohydrates, lipids, and proteins including the enzymes involved.
The metabolic reactions are groups into sets called metabolic pathways. In this module, you will learn details of these pathways including the specific locations in which they take place, their reactants, and their products. These pathways are glycolysis, the citric acid cycle, and the electron transport and oxidative phosphorylation.
Glucose is the body’s primary source of fuel. When glucose supplies are low, fatty acids and amino acids can be used for fuel. In this module you will learn how the body obtains fuel from these sources.
You bring to this module the knowledge about the three major biomolecules involved in metabolism. You have learned the properties and characteristics of these biomolecules from previous modules.
You will most likely enjoy the fact that the material in this module explains the science behind a lot of the different diets, common disorders, and health fads that you may have seen on the news and in other sources such as health-related television shows, reading food labels, and commercials and ads for weight-loss products.