I'd describe these autonomous bodily functions as being
unconscious. Though I recall studies which suggest that most of our decision making is unconscious, we act slightly before consciously
deciding to act.
So it's like we're conscious of a making a decision after the event, playing catch-up, so I'm sort of agreeing with your interaction theory...sort of.
I think part of the difficulty here is trying to pin down what exactly we mean by "consciousness", and there are different ways of thinking about it. We often talk about consciousness as a discreet quality or function but that may well be over-simplistic.