Schizophrenia is a complex disorder in which both and play important roles.

The answer in the spaces provided are; dopamine and glutamine because both of these have played an important role with schizophrenia in which is a complex disorder. The dopamine is the one responsible for acting as a neurotransmitter of the brain while the glutamine is composed of amino acids in which are helpful because they are the building blocks of the protein needed by the body.

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.