________ aggression is premeditated, while ________ aggression which is more spontaneous and limited to a particular situation

The idea that pain signals must pass through a type of "doorway" in the spinal cord is referred to as the ________

a) opponent-process theory of pain
b) revolving door theory of pain
c) substance P theory of pain
d) gate-control theory of pain

A system in which information is conducted in a single route through its various components - like a string through beads - is called a

A) parallel system. B) functional system. C) hierarchical system. D) serial system. E) none of the above