Should I take Cell Bio again before going into A & P 1?

So I recently changed my major to nursing. I took a class called "BI 112 - Cell Biology for Health Occupations" at my community college last Winter, and got a B. That class is the pre-requisite to A & P 1, but honestly I don't know if I really took in ANY of the material. I want to take A & P soon, but should I take this class again to really get down the material well? My girlfriend (who has taken A & P already) and her mother (an RN/Nurse Manager) both think I shouldn't, but will I be at a big disadvantage if I don't remember anything from Cell Bio when I jump into A & P 1?

Thanks for your advice in advance!