also, ask her how many times she has applied to dental schools.... or better yet, ask her how many times has she actually visited dental school's websites and read the PRE-REQ list. Or make it better for both of you, ignore everything she tells you and just come here, the best source of knowledge is SDN for a pre-dental / pre-healthcare student
Majority of dental schools DO NOT have physiology as a pre-reqs (they recommend you take it tho). EVEN in the rare case that a school will require physiology (university of Michigan is an example), you can STILL apply without taking it and simply letting them know that you will be taking the class in the 1-year gab.