A panel of experts analyzed all of the studies they could find that focus on recommended sleep durations and concluded that adults aged 18-64 should get 7 to 9 hours of sleep every night for good health.
Good health, for the purposes of the study includes performance, cognitive health, and executive function—all critical to success in your A&P course.
Yeah, I know, it's HARD to get a full night's sleep when you have to work, have family responsibilities, have too much on your plate, want to hang with your friends, have a roommate with insomnia, are too stressed, etc., etc.
However, there ARE ways to get around these issues and improve your sleep times. Your physician or counselor can help you find sleep strategies that work for you. This video from Dartmouth's Academic Skills Center may also be helpful to you.