Well my school has a testing room located inside the computer lab and there are limited spots for the HESI so we have to reserve our seat in advance. We had 5.5 hours to take our test and the sections I had to take were Math, Grammar, Vocabulary, Reading Comprehension, A&P and Critical Thinking. You only have to take the sections your school requires. No one was looking over our shoulders, they were sitting outside of testing room right next to the large window that allows them to keep an eye out. I definitely wouldn't rush through it. A&P was 30 questions for me I missed 4. Yes def. know endocrine hormones. Know layers of epidermis/dermis. Gland types/functions. Mucles/bones. Tissues, epithelial, connective etc. Joint types (hinge, ball&socket etc). Medulla oblongata function, cerebellum function. Things like that...it's basically a short overview/trivia of API