<P> The social information processing model proposes a variety of factors that determine behavior in the context of social situations and preexisting thoughts . The attribution of hostility, especially in ambiguous situations, seems to be one of the most important cognitive factors associated with the fight or flight response because of its implications towards aggression . </P> <P> An evolutionary psychology explanation is that early animals had to react to threatening stimuli quickly and did not have time to psychologically and physically prepare themselves . The fight or flight response provided them with the mechanisms to rapidly respond to threats against survival . </P> <P> A typical example of the stress response is a grazing zebra . If the zebra sees a lion closing in for the kill, the stress response is activated as a means to escape its predator . The escape requires intense muscular effort, supported by all of the body's systems . The sympathetic nervous system's activation provides for these needs . A similar example involving fight is of a cat about to be attacked by a dog . The cat shows accelerated heartbeat, piloerection (hair standing on end, normally to dissipate heat), and pupil dilation, all signs of sympathetic arousal . Note that the zebra and cat still maintain homeostasis in all states . </P> <Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table>

Which of the following effects does not occur during the fight- or- flight response