Neuroendocrine (Hormonal) Theories of Depression Suggest That One Cause of Depression

Neuroendocrine (hormonal) theories of depression suggest that one cause of depression may be:

A) an underactive HPA axis producing too few stress hormones.
B) an overactive HPA axis producing too many stress hormones.
C) reduced availability of monoamine neurotransmitters.
D) structural or functional abnormalities of brain structures.
E) decreased availability of dopamine within the brain.