appetite {Ans: external drive to eat - pleasant feeling, eat when not hungry}body uses nutritional energy to (4 things) {Ans: Build new compounds. Perform muscular movements (mechanical energy). Promote nerve transmissions (electrical energy). Maintain ion balance within cells.}hormones that decrease hunger {Ans: Leptin, serotonin, cholecystokinin (CCK)}food {Ans: provides calories for energy}environmental forces {Ans: economics, lifestyle, culture, location, climate}environmental assessment {Ans: Includes details about living conditions and background medical history, medication review, social history (marital status, living conditions), level of education, and economic status}