A friend who has been diagnosed with schizophrenia has recently isolated himself from others and avoids most social contact. In addition, he rarely shows any emotion. These changes in his behaviors are considered part of the category of symptoms associated with schizophrenia.

The correct answer is: negative

Explanation:

Schizophrenia has different symptoms, among these negative symptoms that affect the mood of people who suffer from it. These symptoms prevent the incorporation to daily activities, they make lose capacities, abilities or traits of the character that were before suffering from the disorder. Among the most common negative symptoms are anhedonia, abulia, and social isolation.

Answer is negative.

Refer below.

Explanation:

A friend who has been diagnosed with schizophrenia has recently isolated himself from others and avoids most social contact. In addition, he rarely shows any emotion. These changes in his behaviors are considered part of the negative category of symptoms associated with schizophrenia.

what effect does exercise have on the nervous system?

the answer is c.