has part has part has_part characteristic of has modifier enhanced behavioral response to xenobiotic abnormal behavioral response to addictive substance enhanced behavioral response to addictive substance MPheno.ontology enhanced behavioural response to addictive substance MP:0009749 increased sensitivity to an addictive substance capable of inducing the appearance of behavioral response, such as induced hyperactivity or stereotypic behavior, or decreased dosage threshold for the appearance of the behavioral response behavioral response to addictive substance abnormal increased rate