Serotonin levels are a result of all of the following except:

The axons releasing ________ extend from the hypothalamus to the basal forebrain and many other areas, enhancing wakefulness

Fill in the blank(s) with the appropriate word(s).

All of the following describe characteristics of a microexpression EXCEPT they ________

A) are fleeting facial expressions lasting a few tenths of a second B) appear on the face very quickly after an emotion-provoking event C) are generally difficult to control D) are difficult to suppress E) usually do not reveal a person's true feelings