Hello Pie,
I am currently a third year student at Revelle College, UCSD. I will tell you now that UCSD's undergraduate curriculum is GEARED for premeds. In fact, all your bio classes will be focused on medicine and the human body. Also something to keep in mind is that at UCSD, you only need one quarter of G-chem lab, and one quarter of O-chem lab. Whereas all the other UCs (and cal states) require one full year of lab each. Why is this? Pre-med students could care less about lab techniques. This can be looked as a strength or a weakness. If you want to do research, lab techniques will come in handy. Also at UCSD, our physiology lab works on real cadavers.
Also, they have the major Human Biology B.S. (which is what I am in) which offers classes that directly pertain to what you will be learning in med school, such as pharmacology, medical microbiology, endocrinology, molecular basis of disease. They have a strong pre-med connection with the UCSD school of medicine which holds seminars for us pre-meds.
It is a myth, however, that UCSD favors there undergrads. It is also a myth that being an undergrad is a BAD thing for admissions too. The percentages are high of UCSD undergrads in UCSD-SOM is because many people fall in love in San Diego. Good luck with your journey! I will be happy to answer any more questions you have of UCSD.