This kind of predictive control can support anticipatory responses, through predictions about future bodily states and their dependence on this-or-that action. This kind of anticipatory control can be critical for survival. For example, it may turn out very badly to wait for something like blood acidity to go out of bounds before mustering an appropriate response. Again, the relevant actions can be external, internal, or both. Running away from a bear before being eaten is an example of external anticipatory regulation. The transient increase in blood pressure needed to run away effectively,
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