Penn State NUTR 251 You expend energy (ie. Body uses food for fuel) in three categories

Penn State NUTR 251 You expend energy (ie. Body uses food for fuel) in three categories

You expend energy (ie. Body uses food for fuel) in three categories. List these categories and define them. For the average semi-sedentary American, what category is responsible for the most calorie expenditure? What percentage does BMR account for?