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SCI 220 chapter 1

What is a definition for nutrition?
Nutrition is the science that links foods to health and disease.
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Play audio for this term

What does the subject of nutrition include?
The subject of nutrition includes the processes by which the human organism ingests, digests, absorbs, transports, and excretes food substances. 
What is the benefit of food to the body?
Food provides the energy in the form of calories as well as the materials needed to build and maintain all body cells.
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What is the benefit of nutrition to the body?
Nutrients are the substances obtained from food that are vital for growth and maintenance of a healthy body throughout life.
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What is one classification of nutrients?
Nutrients can be classified as essential or nonessential
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What is an essential nutrient?
An essential nutrient is a nutrient that the body either cannot synthesize on its own or cannot make an adequate amount of, and must be provided by the diet because it is necessary for the body to function properly.
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What criteria must be met for a nutrient to be considered "essential?"
For a nutrient to be considered essential, it must meet the following criteria:
1) At least one specific biological function of the nutrient in the body must be identified.
(2) Omission of the nutrient from the diet must lead to a decline in certain biological functions, such as production of blood cells.
(3) replacing the omitted nutrient in the diet before permanent damage occurs will restore those normal biological functions.
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Why should you study nutrieiton?
You should study nutrition because is a lifestyle factor that is a key to developing and maintaining an optimal state of health for you.
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What are some possible consequences ofpoor nutrition and a sedenmentary lifestyle?
A poor diet and a sedentary lifestyle are known to be risk

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