Bianca, 22 years old, is slightly overweight and loves to eat, particularly junk food and high-calorie desserts. Fearful of gaining weight, Bianca often takes a laxative following an episode of binge eating. Bianca seems to be suffering from:

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.