Terminology

Definitions

Please take some time to familiarize yourself with the definitions, terms, and equations listed below as they will be expanded upon throughout this course.
Calorie
A unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure; used by nutritionists to characterize the energy-producing potential in food.
Macronutrient
A nutrient, such as a carbohydrate, fat, or protein that is needed in relatively large amounts.
Carbohydrates
Mainly sugars and starches, together constituting one of the three principal types of nutrients used as energy sources (calories) by the body.  "Carbs" can also be defined chemically as neutral compounds of carbon, hydrogen and oxygen.
Simple Carbohydrates
Various forms of sugar, such as glucose and sucrose that are composed of smaller molecules.
Complex Carbohydrates
Long- string carbohydrate molecules such as starches and fibers.
Fat
Complex molecules composed of fatty acids and glycerol.
Proteins
Large organic compounds made of amino acids arranged in a linear chain and joined together by peptide bonds between the carboxyl and amino groups of adjacent amino acid residues.
“Empty calories”
Low-nutrient, energy-dense foods, including sugar-sweetened beverages.
Nutrient-dense foods
Food that provide substantial amounts of vitamins and minerals and relatively fewer calories.
Basal Metabolic Rate (BMR)
The rate at which the body uses energy while at rest to keep vital functions going.
Harris Benedict Equation
A formula that uses the Basal Metabolic Rate (BMR) and then applies an activity factor to determine a total daily energy expenditure (calories) of an individual.