VACUE:

A． It creates a neurological signal only when it comes into contact with its primary tastant.
B． Its function is not to identify tastes, but to identify similarities and differences between them.
C． Its primary importance is in distinguishing between the various qualities of a mixed stimulus.
D． It provides roughly equivalent signals when in contact with a major stimulus and a minor one.
E． It plays a fairly minor role in the across-pattern theory, compared to the labeled-line theory.

A． illustrating the extent to which the physiological principles behind taste mirror those behind vision
B． contrasting the available evidence for the labeled-line and across-neuron theories of taste
C． describing the evolution of theories concerning the neurological mechanisms which determine taste
D． demonstrating the superiority of holistic models over component models in analyzing neuron function
E． showing that individual neurons play a negligible role in the physiological mechanisms of perception