The opening of chloride ion channels results in which of the following?

These cellular structures contain neurotransmitters and protect them from being degraded by enzymes:

Head injuries can cause depression.

If intrusive symptoms seen in PTSD are successfully treated with psychiatric medications, often there is a corresponding decrease in which of the following?

Which one of the following medications has been shown to decrease nightmares in people suffering from PTSD?

Which of the following drugs were available in the 1940s for treating psychiatric disorders?

What percent of dysthymic patients go on to experience a major depressive episode?

Which of the following is generally considered to not be a sign of atypical depression

The following is seen when there is an activation of the immune system:

Initial insomnia may be seen with depression but is not diagnostic of a major depressive disorder.