Would med schools question/ask about an applicant with a decent GPA w/ low grades in lab courses?
I don't think blaming the professor or TA's gets you anywhere. Because I am sure out of those 2,500 students many got A's. So talk about why you did not do well, not why the teacher was bad. Also, low grades in labs do matter especially if its a pre-med required course. Admissions will look at all grades and even though lectures are weighed more.
Would med schools question/ask about an applicant with a decent GPA w/ low grades in lab courses?
I think it is generally understood that Lab grades can be highly arbitrary and the curve (if it is applied) is exceedingly unfair. Most of the time the curve ensures that only 2 students can get an A and the difference between that and an A- or a B is like 3 points depending on the distribution. I think this is why they are typically "worth" less credit hours than a lecture course. I think having some low lab grades and an overall good GPA (3.75+) is perfectly fine. Just keep an eye on your BCPM GPA and try to do a little bit more footwork to get a good TA (which is basically impossible).