That's a really good question. You may want to call the school or email the school and find out. The program director and her secretary are very helpful and quick to respond. It's better to find out from the source.
I know some schools don't care whether you have a Bachelor's in something else, but I think the majority of the CRNA schools do want you to have a Bachelor's in Nursing... even though CRNA is very much science based and USC is a Master's in Science, not a Master's in Nursing.