Thanks everyone for your responses. 🙂
Street Philosopher... so what if I am new here, so what if I have questions that I could have searched. Personally, I am so busy studying that I have enough time to check in here and there and it is both faster and more personal if I post the question myself. If you did not like the fact that I asked a question, then you should have restrained from answering.
To all of those that kindly answered my question, thank you. I appreciate all the responses that have given me alittle more insight.
As my mother always told me, there is no such thing as a stupid question. Street Philosopher, maybe you can remember that when you encounter patients. I hope you treat their questions more kindly then you treated mine. I guess sometimes it is easier to ridicule people on line than irl.