What kind of "concepts" do you mean? I assume the program is towards cognitive neuroscience / biological psychology / neuropsychology rather than really hardcore (cellular) biological stuff. My first uni course about that used Kalat's Biological Psychology which I remember being a very nice general introduction, http://www.amazon.com/Biological-Psychology-James-W-Kalat/dp/1305105400 (there may be something weird about the soft cover version being incomplete, I just saw in a comment).