There is a biochemical and anatomical difference. Exhausted would implies that there is no available energy for the task at hand and enervated would suggest that the intended task lack the nervous potential to be actuated. That said, in popular discourse, there is not much difference between the two.
Systems theory has also been developed within sociology. An important figure in the sociological systems perspective as developed from GST is Walter Buckley (who from Bertalanffy's theory). Niklas Luhmann is also predominant in the literatures for sociology and systems theory.
Two of the most known perspectives in psychology are the learning and the cognitive perspectives. The learning perspective is a psychological approach that reflects how the environment and how experience affects a personâs or animalâs actions. It emphasizes the importance of a unique experience in families, schools, and communities. Within this perspective, psychologist keeps their attention mainly on the environmental rewards and punishers that maintain or discourage certain behaviors. Behaviorists do not generally order the mind to explain behavior.