Contains the full lesson along with a supporting toolkit, including teachers’ notes.
What is a nutrient?
In this lesson we will look at the importance of nutrition and the role each of the main biomolecules - proteins, carbohydrates, lipids (fats, oils) and vitamins as well as the role of minerals in providing a balanced diet to supply our body with sufficient nutrients.
A nutrient is any substance absorbed by an organism from its external environment and used in the organism's metabolism. Nutrients are both a source of energy and a source of materials needed for growth, maintenance, defence and reproduction of cells.
What is food?
Food is a nutrient-rich material. As such, it is a good source of one or more of the following - proteins, carbohydrates and lipids. In addition, our diet must also contain foods which supply vitamins, minerals and water. The process by which an organism obtains energy and materials needed for its metabolism is called nutrition.
What is metabolism?
Metabolism is all the biochemical reactions, both anabolic and catabolic, that take place in the life of an organism. Anabolism is the formation of large complex organic molecules by the linking smaller simpler biomolecules. Anabolic reactions require energy to take place.Catabolism is the breakdown of these large complex biomolecules into smaller simpler biomolecules. Catabolic reactions release energy as they occur.