Each medical term built from word parts contains one or more:

Each medical term built from word parts contains one or more word roots.  A medical term that is formed from the first letters of the words in a phrase, can be spoken as a whole word, and usually contains a vowel is an acronym. 

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.