Agree with what's been said above. Pathoma is good for explaining pathologies, and gives a cursory review of physiology at the start of each section, but doesn't really go the distance on a lot of things.
I've found medscape's "pathophysiology" section useful whenever I can't find the answers. If it's not there, usually a lengthy search for articles.
Heard good things about Goljan being very detailed but I don't plan on doing that until 2017.