Whether you have experience as a medical assistant or this is your first job, talk about one of the challenges or tedious tasks that you anticipate will be difficult or less than enjoyable. Be careful not to seem like you are easily irritated. Share something small.
"I'm a people person and I enjoy working with patients, but when it comes to paperwork, I find it tedious. I understand it is a part of the job, so I try to keep a good attitude."