If you happen to know the answer, you feel so good about yourself that you'll never forget that fact. If you don't know the answer, you feel so stupid that you'll look up the fact, read about the whole disease, maybe the whole chapter, just to keep from feeling quite so stupid. And you'll never forget that fact. Call schedules can vary from every other night to every fourth or fifth night. Actually working in the hospital all night in addition to your regular day-hours.
Third year is certainly the most traumatic year of medical school, both emotionally and physically.
The hours are long, we'll be faced constantly with our lack of knowledge, feelings of worthlessness, ethical dilemmas, etc. It's also the year when we learn most of the knowledge that will eventually make us useful as physicians and therefore the most rewarding of the years we spend here. I'll write more about third year as I get into it, with perhaps a little more insight about the whole process. When compared to the hectic pace of third year, fourth year generally seems like a vacation. Now everybody does one.