The Notion That Learning a Conditioned Emotional Response to a Tone

Multiple Choice

The notion that learning a conditioned emotional response to a tone involves long-term potentiation is supported by studies in which

A) cells of the amygdala do not show evidence of long-term potentiation.
B) electrical stimulation of neurons that project to the amygdala produces less overall neural firing in the amygdala.
C) a drug that blocks the NMDA receptor blocks CER learning.
D) activation of NMDA receptors impairs CER learning.
E) few NMDA receptors are found in the amygdala.