A substance, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Also called levarterenol, noradrenalin. norepinephrine.
Foods that only contain protein, fat or both -- and are carb-free -- are few and far between. Most foods contain at least some carbohydrates. However, plant-based oils, other pure fats -- like butter and margarine -- meats, poultry, seafood and eggs are the best sources of carb-free foods.
Fruits. Fruits are often referred to as carbohydrate foods, because they are primarily comprised of carbohydrates and only have trace amounts of fat and protein. A single serving from the fruit group includes a small 4-ounce piece of whole fruit, 4 ounces of 100 percent fruit juice or 2 tablespoons of dried fruit.lmost all foods in your diet contain some type of carbohydrate, however, meat, eggs and some types of seafood are the only foods that do not have carbs.