This is how you classify your courses:
"Each course in the AMCAS application must be classified strictly on the primary content of the course. You are responsible for selecting the correct course classification, but AMCAS reserves the right to change classifications if the assigned classification clearly does not apply.
In the event that you are unable to comfortably classify a course, or in the case of interdisciplinary courses, refer to the description of the course on your school's Web site or consult with your Pre-health Advisor to choose the most appropriate classification."