1. The body's initial physiological and psychological reaction to a stressor, occurring within seconds or minutes, including activation of the sympathetic nervous system, increased heart rate, and heightened alertness
The immediate stress response triggered by the loud noise caused her heart to race.
A resposta imediata ao estresse desencadeada pelo barulho alto fez seu coração acelerador.
2. The fight-or-flight reaction that prepares an organism to confront or escape a threatening situation
His immediate stress response activated all his senses when facing the emergency.
Sua resposta imediata ao estresse ativou todos os seus sentidos ao enfrentar a emergência.