<prompt> Which of the following is the most likely explanation for the dental abnormalities in bulimia nervosa BN?self-induced physical traumaself-induced vomitingexcess cortisol levelsosteoporotic changes  <response>: Recurrent vomiting and exposure of the teeth to stomach acid leads to loss of dental enamel and eventual chipping and erosion of the teeth. The vomiting may be manually induced, but eventually most patients with bulimia BN are able to trigger vomiting at will. 