Which of the following is NOT a characteristic of the regulator subsystem?

The correct answer highlights that "Learning and information processing" is not a characteristic of the regulator subsystem. The regulator subsystem is primarily concerned with maintaining homeostasis within the body by responding to internal and external changes. This includes regulating vital signs, such as heart rate and blood pressure, as well as biochemical responses, like blood sugar levels and gastric acid production, which are crucial for digestion and metabolic processes.

The regulator subsystem focuses on physiological responses rather than cognitive functions. Learning and information processing are attributes more relevant to cognitive or neural subsystems, which are responsible for higher-level processes such as thought, memory, and problem-solving rather than direct homeostatic regulation. Thus, the inclusion of cognitive functions in this context distinguishes it from the fundamental roles of the regulator subsystem.