Teamwork

I'm really unhappy with some of our RN supervisors. When we (floor nurses) ask them to do something (like assess a pt.) or get us something we need (supplies that are locked up), we get so much attitude and many times they do not come through for us. The other night I asked 2 supervisors to do something for a pt, and because they did not do this I was questioned by the DON. I was busy with another responsibility and I asked for help. I was told that I should have done what I asked them to do. I like everyone I work with, but I have seen many of our RN's giving extra work to LPN's. It doesn't feel like a team and we are being reprimanded when there is a problem.