Explain the biological mechanism of Selective Serotonin Reuptake Inhibitors (SSRI) and critically discuss the role of serotonin in depression and human behaviour.

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Explain the biological mechanism of Selective Serotonin Reuptake Inhibitors (SSRI) and critically discuss the role of serotonin in depression and human behaviour. Support your argument using empirical evidence. Please read through&follow the instructions on the attached documents CAREFULLY. This is cruicial in order to complete the assignment. Use these two sources + 3 other sources appropiate to the task. Cowen, P. J., & Browning, M. (2015). What has serotonin to do with depression?. World Psychiatry, 14(2), 158-160. (Article)