The human condition is such that all of us may be vulnerable to seasonal affective disorder. If placed in an environment sufficiently deprived of light we would all develop a reversible syndrome of major depression.

Bright light may be responsible for suppression of nocturnal pineal gland production of which of the following?

A. Insulin

B. Oxytocin

C. Prostacyclin

D. Melatonin

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Mini Quiz: Light Therapy for Seasonal Affective Disorder

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