Are active elements BP and Anims Also Culled

Hi I Was Reading about the UE4 Culling System and after placing a few dozen Blue Print and Sequencer elements into A level I suddenly wondered if these are always running or are they only running when the culling system sees they can potentially be seen?? for example a large building with roof fans in different rooms are they always using processor cycles or are they turned off and on as the player moves around ?

I guess there would also be active elements that you do want to be running all the time and others that you do not.

Thanks for any highlights …all the best