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Nutrition

Total processes of ingestion, digestion, absorption, and metabolism of food and the subsequent assimilation of nutrient material into the tissues. 

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Nutrient

substance found in food that performs one or more specific functions in the body

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Six Different Categories of Nutrients

Carbs

Fats

Proteins

Vitamins

Minerals 

Water

 

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Functions of Nutrients

1. Promotion of growth and development: Mainly performed by proteins.

2. Provision of energy: predominately performed by carbs and fats

3. Regulation of metabolism: nutrients used in this function are vitamins, mineral, and protein

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Phosphorylase

breaks down carbohydrates stores in liver and muscles

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Hemoglobin

another important protein found in erythrocytes. Oxygen carrier

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Erythrocytes

Essential for transport of oxygen from lungs to the tissues, and hemoglobin acts as an oxygen carrier

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Macronutrients

nutrients for which the daily intake is more than a few grams