Matching Pairs Macronutrient Sources and FunctionsOnline version Match the Sources and Functions to the nutrient by Lisa O'Leary-Reesor 1 protein sources 2 unsaturated fat function 3 saturated fat function 4 carbohydrate food sources 5 carbohydrates main function 6 saturated fat food sources 7 macronutrients 8 protein main functions 9 unsaturated fat food sources 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 provide calories (energy), consist of pro, fat and carbs