Lecture01

Lecture01 - 1 Chapter 1: An Overview of Nutrition Food...

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Chapter 1: An Overview of Nutrition Food Choices : Humans are omnivores. Significance of choices : Humans can use a wide variety of fuels, or in other words, humans can function on a wide variety of foods. There are long-term consequences of poor eating choices. Six classes of nutrients : Nutrients chemical substances obtained from food and used in the body to provide energy, structural material (building blocks), and regulating agents that support growth, maintenance, and repair of the body's tissues Nutrients may also reduce the risk of some diseases. The six classes of nutrients are: Carbohydrates lipids (fats) proteins vitamins minerals water The first 4 are organic materials, the last 2 are inorganic materials. What about oxygen? Of all the things humans need (food, water, etc.), nothing brings death quicker than O 2 deprivation. Why O 2 is important: a key reactant in energy-releasing metabolic reactions: food + O 2 waste products (CO 2 , H 2 O, urea, etc.) + ENERGY 1
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Lecture01 - 1 Chapter 1: An Overview of Nutrition Food...

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