Final answer:
Paranoid delusions involve the (false) belief that other people or agencies are plotting to harm the person.
Step-by-step explanation:
Paranoid delusions involve the (false) belief that other people or agencies are plotting to harm the person. These delusions are commonly seen in mental illnesses such as schizophrenia. In schizophrenia, patients may experience hallucinations and delusions, including paranoid delusions. The development of schizophrenia is thought to involve malfunctioning dopaminergic neurons and may also involve problems with glutamate signaling. Antipsychotic medications are commonly used to treat schizophrenia by decreasing dopamine neurotransmission in the brain.