^My great concern for this person would be his hate for science classes in UG. If in UG, they at least had a mixture of science and non-science, there is no such thing in med. school. It is all science and much much harder than it was in UG, even for those who never hated science and who got all As in UG science classes and actually love and are very interested in academics at Med. School, it is the most challenging academic experience that they ever had.
Yes, absolutely they do human cadavers, how else one can learn? And many enjoy this part whole tons, they are future docs after all.
If do not like it, do not do it. If one think that the most difficult part is to get into Med. School, here is a comment from my D., who routely interview applicants: "poor things, they do not know what is waiting for them", and this is coming from the person who is absolutely passionate about all this learning, anatomy lab, everything, she just cannot see herself in any different proffession.