In the eye, the ____________________ is the protective outer layer of the eye that with the lens functions to focus the image

When a neuron fires, it fires in a(n) _____ fashion, as there is no such thing as "partial" firing

A) all-or-none B) rapid fire C) accidental patterned D) quick succession

A disorder in which excessive anxiety and worry occur more days than not for at least six months is called __________

a) panic disorder. b) obsessive-compulsive disorder. c) generalized anxiety disorder. d) phobic disorder.