I don't think you should be expected to know the normal ranges on all lab values as an M1/2 if that's what you're asking, since normals vary from one laboratory to another. Board exams/Step exams provide a table for that kind of thing, and your school should as well. As far as lab interpretation, you progress through M2 pathology and obviously your M3 IM rotation you should get a better feel for it. There's no easy way to it, just like everything else in medicine really.
I agree that it's frustrating sometimes, but I would disagree with the previous poster. Attending level investigation seems to utilize labs/rads/path/etc. as just another tool, ones that are equal if not inferior to history/physical. Treat the patient not the number. And so it is with exams; stems should always give multiple pertinent positives and negatives to lead you to the correct answer and away from the incorrect ones. If a question hinges on the student knowing say whether a white count of 11 is abnormal or not then that's a problem with the question, not your knowledge fund.
