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  • What are the three classes of nutrients that supply the body?

  • A) carbohydrates, fats, and proteins are the three classes of nutrients that supply your body with energy. Did this page answer your question? Still have questions? Transition activities for individuals that are gifted and talented should being 12 – 24 months prior to graduation to high school.

  • What are nutrients and why are they important?

  • Nutrients are chemical substances found in food that are required by the body to provide energy, give the body structure, and help regulate chemical processes. There are six classes of nutrients:

  • What is the main source of energy in the human body?

  • Carbohydrates are a major fuel source for all cells of the body, and certain cells, like cells of the central nervous system and red blood cells, rely solely on carbohydrates for energy. Lipids are also a family of molecules composed of carbon, hydrogen, and oxygen, but unlike carbohydrates, they are insoluble in water.

  • How many proteins are there in the human body?

  • Scientists estimate that more than 100,000 different proteins exist within the human body. Proteins can also provide energy, though this is a relatively minor function, as carbohydrates and fat are preferred energy sources. There is one other nutrient that we must have in large quantities: water.

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