It's all science and math classes, regardless of whether or not they're prereqs for med school.
AP credit varies from school to school. Some accept all credit outright, others only accept only credit for non-lab courses (they don't trust the level of lab skills learned in a high school AP class as a sufficient supplement for college labs), still others don't accept AP at all. Some actually have a weird system in which they'll accept AP's but still "strongly encourage" (read: expect) you to take additional higher level courses in that subject (i.e, genetics over general bio, biochem over gen. chem) to prove that you can still excel in that field in a college setting.
Depending on where you want to apply, you may want to play it safe and either take your prereqs in college or at least take higher level courses in those subjects you tested out of.