Matching Pairs Macronutrient Sources and FunctionsOnline version Match the Sources and Functions to the nutrient by Lisa O'Leary-Reesor 1 saturated fat function 2 protein sources 3 unsaturated fat function 4 macronutrients 5 carbohydrates main function 6 unsaturated fat food sources 7 saturated fat food sources 8 carbohydrate food sources 9 protein main functions provide calories (energy), consist of pro, fat and carbs insulates body and plumps it up but too much is bad for your heart; high source of energy contributes to healthy heart, high soruce of energy, transport vitamins A,D,E,K around body