Science asked in Science & MathematicsMedicine · 8 years ago

In nutrition, the word essential means?

a. necessary for good health and proper functioning of the body

b. a necessary nutrient that can be obtained only from the diet

c. that the body can manufacture the nutrient from raw material

d. compounds the body can make for itself

***I think the first three alternatives are correct and complementary. Which of them should I choose?

***Also, what's the opposite of essential?

Update:

What does "raw material" mean?

3 Answers

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  • 8 years ago
    Best Answer

    b. a necessary nutrient that can be obtained only from the diet

    The opposite would be "non-essential" - meaning that the body can produce these substances as needed, as in choice C.

    You see this often when reference is made to "essential fatty acids".

    Essential fatty acids, or EFAs, are fatty acids that humans and other animals must ingest because the body requires them for good health but cannot synthesize them. The term "essential fatty acid" refers to fatty acids required for biological processes, and not those that only act as fuel.

    Only two EFAs are known for humans: alpha-linolenic acid (an omega-3 fatty acid) and linoleic acid (an omega-6 fatty acid). Other fatty acids that are only "conditionally essential" include gamma-linolenic acid (an omega-6 fatty acid), lauric acid (a saturated fatty acid), and palmitoleic acid (a monounsaturated fatty acid).

    An essential nutrient is a nutrient required for normal body functioning that either cannot be synthesized by the body at all, or cannot be synthesized in amounts adequate for good health (e.g. niacin, choline), and thus must be obtained from a dietary source. Essential nutrients are also defined by the collective physiological evidence for their importance in the diet, as represented in e.g. US government approved tables for Dietary Reference Intake.

    Some categories of essential nutrients include vitamins, dietary minerals, essential fatty acids, and essential amino acids. Different species have very different essential nutrients. For example, most mammals synthesize their own ascorbic acid, and it is therefore not considered an essential nutrient for such species. It is, however, an essential nutrient for human beings, who require external sources of ascorbic acid (known as Vitamin C in the context of nutrition).

    EDIT: I think by "raw material" they are referring to the basic food eaten.

  • Anonymous
    8 years ago

    "An essential nutrient is a nutrient required for normal healthy body functioning that either cannot be synthesized by the body at all, or cannot be synthesized in amounts adequate for good health and thus must be obtained from a dietary source."

    "Essential" means (A) necessary for the good healthy and proper functioning of the body.

    An "Essential Nutrient" is A and B - necessary for good health and cannot be synthesized by the body in adequate amounts and there for needs to be obtained from the diet.

    Answer C and D is false.

    A raw material ( in nutrition) is the basic building blocks needed so the body can manufacture an end product.

    Nutrients are frequently categorized as essential or nonessential.Both are needed by the body but the non essential nutrients can be also be manufactured if the correct building blocks (raw materials) are available. (2)

  • 8 years ago

    A.

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