Lecture02

Lecture02 - 1 Lecture 02 Vitamins Organic substances...

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Lecture 02 Vitamins Organic substances Essential nutrients required in small amounts by the body for health. There are 13 different vitamins, 9 are water-soluble, 4 are water-insoluble (fat-soluble). Minerals : Inorganic elements or compounds, some of which are essential nutrients. Two groups: 1. The major minerals: Ca 2+ ; P; K + ; Na + ; Cl - ; Mg 2+ 2. The trace elements: For example, Fe. More than 13 trace elements are essential to good health Water : Humans are aqueous systems containing about 60% water by weight (adults). Lean tissue is 75% water; fat tissue contains less than 25% water. Recommended water intake is 1 to 1.5 mL/kcal expended/day, so if a person expends 2,000 kcal/day, 2 to 3 liters (about 2 to 3 quarts) of water are recommended. Macronutrients versus Micronutrients Macronutrients : Nutrients needed by the body in large amounts. These include water and the nutrients that provide energy and building blocks: carbohydrates, fats,
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This note was uploaded on 04/07/2008 for the course PHYS 102 taught by Professor Conetti during the Spring '08 term at UVA.

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Lecture02 - 1 Lecture 02 Vitamins Organic substances...

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