Clearly, our responses to today's obesity-promoting environment, in tandem with genetic influences, are the most significant causes of overweight and obesity. But in some people, drug side effects, illnesses, and genetic disorders can also play a role.
Master's degree programs for RNs with a bachelor's degree generally take 1-3 years to complete, depending on the school and the specialty. Graduates with a non-nursing bachelor's degree have the option of enrolling in a BSN-to-master's degree fast-track program.
You need four years of college followed by four years of medical school, one year as an intern and three or four years in an anestheiology residency program. In total -- that is 12 years (though you get paid as an intern and resident). Chemistry would probably be a good major. It depends on what route you want to go. If you want to go the Med School route, it will take 8-10 years before you are registered to practice as an Anesthesiologist. The other route to go is to become an Registered Nurse, get your Bachelor of Science in Nursing, then go through a Master's Degree program to become a Certified Registered Nurse Anesthetist (CRNA.)