Compared with healthy controls, people with schizophrenia show evidence of having
a. abnormally low amounts of dopamine.
b. abnormally high amounts of dopamine.
c. increased numbers of glutamate receptors in their brains.
d. reduced numbers of glutamate receptors in their brains.
Question 2
Why are researchers investigating a possible role for glutamate in schizophrenia?
a. Known antipsychotic medications have their primary effects on glutamate.
b. People with schizophrenia have abnormal levels of glutamate activity.
c. PCP use, which affects glutamate systems, mimics most symptoms of schizophrenia.
d. Glutamate levels are directly influenced by cocaine and amphetamine.
Phytochrome controls germination by responding to red/far red light signals.
Variation in coat pattern in zebras. The patterns show progressively more black left to right and to
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