2.0 Introduction

As you have learned, there are three energy-yielding macronutrients: carbohydrates, proteins, and lipids. The energy contained in these molecules is found in the electrons that are shared in the covalent bonds that link the atoms. Our individual cells (in a process called Cellular Respiration, documented in a later chapter) deconstruct these molecules, and use the energized electrons to generate the ATP needed to keep our cells alive. This chapter goes more in depth about these major dietary components that are so critical to life.

Sections:

• 2.1 Carbohydrates
• 2.2 Proteins
• 2.3 Lipids