Humans hear sounds ranging from 16 to ______ hertz

Of the following individuals, the one MOST likely to commit suicide would be a:

A) 10-year-old with high serotonin activity. B) 10-year-old with low serotonin activity. C) 40-year-old with high serotonin activity. D) 40-year-old with low serotonin activity.

Sharon's 46-year-old husband suffered a traumatic brain injury in an automobile accident. What information about brain plasticity can you provide to Sharon?

A) Brain plasticity is restricted to early childhood, when the brain is forming many new synapses. B) At older ages, specialized brain structures are in place, and after injury they cannot reorganize. C) Adults with brain injuries rarely show deficits in spatial skills, even if language development is impaired. D) Though far more limited than in early childhood, reorganization in the brain can occur in adulthood.