Physiology major?

<p>Am wondering, what is a physiology major like? Challenges..etc..I really like the concept of how the body works, but I don't want to regret getting into a major I won't successfully complete?...
Am having a difficult time narrowing down majors!!?? Any help..? And am planning to go to Medical school afterwards, if that helps. How long does it take to do a Major and a Minor? For example a Major in Physiology and a Minor in Social Psychology.</p>