Health Sciences 1001A/B Lecture 7: Lecture 7- Chapter 5 - Nutrition.docx
9 Sep 2013
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An area in which you have increased control. Provide s body with nutrients required to: produce energy, repair damaged tissue, promote tissue growth, regulate physiological processes. Body requires proteins, fats, carbohydrates, vitamins, minerals and water: essential nutrients. Meaning you must get substances from food. Body cannot manufacture them, or not in great enough quantities. Energy in food express in kilocalories: scientific expression of the energy value of a food, how much energy it takes to raise 1l of water by 1 degree celsius. Three classes of essential nutrients supply energy: fats = 9 calories/gram, protein = 4 calories/gram, carbohydrates = 4 calories/gram. If all types of calories are greater than energy needs converted to fat and stored in the body. Promotes growth and maintenance of body tissue. Primary component of muscle and connective tissue. Form important parts of: blood, enzymes, some hormones and cell membranes. When an essential amino acid is missing from a diet deficiency.
