Trekkie is certainly right that if you take a college course (bio for bio, chem for chem etc) at a level higher than intro because of AP the schools love that.
However, I AP'd physics and that did not matter but for one school I looked at (mainly 1st tier schools). Yet, physics is the "least essential" college science for the 1st year med student so I would anticipate you would have much more difficulty ap'ing biology (chem might be okay b/c orgo relies upon gen chem to some degree). For the final word, email adcom members.
Good luck.