How common are delusions in schizophrenia?
A. They are experienced by approximately 50 percent of schizophrenics.
B. Delusions are an essential feature of schizophrenia; their presence is required for a diagnosis of schizophrenia.
C. Over 90 percent of those with schizophrenia experience delusions.
D. While hallucinations are a common occurrence in schizophrenia, delusions are rare.
Answer: C
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Despite its dangers, a young man continues to take cocaine because of the feelings of euphoria it produces for him. This powerful arousal of his nervous system is probably due to cocaine's ability to ______
a. inhibit enzymes that break down neurotransmitters b. increase the release of neurotransmitters c. block the receptor sites for neurotransmitters d. prevent neurotransmitters from being reabsorbed into the synaptic vesicles