One line of evidence that indicates biological factors contribute to anxiety disorders involves

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Quizplus · Accepted Answer

The neurotransmitters GABA and serotonin have been implicated in the development of anxiety disorders, suggesting a biological basis for these conditions. Stressful events, structural abnormalities of the brain, and classical and operant conditioning may also contribute to the development of anxiety, but do not necessarily indicate a biological factor.

One Line of Evidence That Indicates Biological Factors Contribute to Anxiety