How do material leave the nucleus?

Both plant cells and animal cells have a nuclues.The nucleus of both plant and animal cells have pores on their double membrane.These pores allow the nucleus to communicate with the outside environment that is the cytoplasm.This can be through sending of substances into the nucleus.For example mRNA.

However there are times when the materials are very big than the pore.In this case energy which is normally ATP combines with the substance to force it to penetrate.