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