Although bipolar I disorder is described as "bipolar,

A) both depressed and manic symptoms typically occur simultaneously.
B) a year or two commonly passes between manic and depressed episodes.
C) few patients show both manic and depressed symptoms.
D) a depressed episode is not necessary for a diagnosis.

D

Psychology

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Which prenatal diagnostic technique has the highest risk of inducing an accidental miscarriage?

a. Amniocentesis b. Chorionic villus sampling c. Pedigree analysis d. Ultrasound imaging

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The primary purpose of cerebrospinal fluid (CSF) is to a. nourish the cells of the brain and spinal cord

b. float the brain within the skull. c. remove toxins from the brain and excrete them from the body. d. provide circulation for chemical messengers.

Psychology