“Recent evidence suggests the involvement of the endocannabinoid (EC) system in the regulation of anxiety.The aim of present work was to study the role of the EC system in cat odour-induced anxiety in rats… Exposure to cat odour induces anxiogenic-like effect on the behaviour in rats… Relation of predator odour-induced anxiety to the inhibition of the EC system in the amygdala and PAG is supported by behavioural studies where blockade of CB1 receptors by rimonabant induces anxiogenic-like action.”

http://www.ncbi.nlm.nih.gov/pubmed/17882402