minstrel show or executive function

Via the always brilliant Mind Hacks’ Spike Activity that encapsulates weekly developments in neuroscience and psychology come an interesting study that the chemical signals that the blood delivers to the brain are not merely the well-travelled troubadours with reports of far-off happenings and fuel sources they they are generally taken to be but rather selective in their service.
I was always grateful that our bodies were smarter than us. Blood flowing into the folds of the brain does not just blindly acquiesce to the demands of the neurons, it seems, but rather can itself dictate what parts of the brain receive nourishment and assert a political influence after a fashion over the choices we make and priorities assigned. The circulatory system (which also pushes lymph) does not take orders from the brain from conception but like language and motor-skills, is also a learnt behaviour, which really is saying quite a lot about self-discipline. What do you think? What if it’s true that the blood can veto our will or lack of resolve?