Rats and silver foxes selectively bred for increased brain levels of ______ and _____ are more tame than expected.
A) dopamine; DOPAC
B) serotonin; 5-HIAA
C) GABA; glutamate
D) dopamine; HVA
E) serotonin; HVA

Question

Quizplus · Accepted Answer

Serotonin and its metabolite 5-HIAA (5-Hydroxyindoleacetic acid) are associated with increased tameness in animals selectively bred for this trait. Serotonin is a neurotransmitter known to influence mood and social behavior, which explains the observed increase in tameness.

Rats and Silver Foxes Selectively Bred for Increased Brain Levels