While applying to colleges, create a rough draft of where you want to take your medical career. This shouldn't be a stress-inducing commitment. Consider it a map towards your success. The way to accomplish seeming insurmountable goals is by breaking those goals into smaller, more easily attainable goals. Macro goals are broken into micro goals. Imagine you have a big picture of what you want your future to look like. Now take that picture apart, like you are disassembling a puzzle. But don't worry, you can change what that picture looks like at any time. You can modify and change your direction the further you go down your road towards realizing your potential. That is an expected part of the process. This will help you answer questions such as these as you interview for colleges, and later as you interview for jobs.
Developing your career plan, and planning it out for every five years, revising it periodically as your goals or timelines change, will help you reach those milestones, and will be a selling point in your future career pursuits. Having a self-development plan is incredibly important for anyone. The interviewers want to know your plan and how attending Brody School of Medicine will help you accomplish those goals. If they are going to invest in you, they need assurances that you have a plan in place to invest in yourself as well. If you need help planning this out, consult a mentor in the medical industry to help you.