Multiple choice The chemical, serotonin, causes all of the following reactions EXCEPT: dependence on another person impulse control feelings of attachment to others overpowering feelings of love Reveal answer Fill a bubble to check yourself C Correct answer Explanation Serotonin levels actually drop during the early, obsessive stage of love, which can lead to compulsive thinking and dependence. Feelings of long-term attachment, however, are primarily driven by oxytocin and vasopressin, not serotonin.