When faced with situations of real or perceived sudden danger the body sets in motion a series of physiological changes in preparation either for a fight or to take flight. This acute stress response ...

Adrenaline is considered crucial in triggering a 'fight or flight' response, but new research shows the response can't get started without a hormone made in bone. When faced with a predator or sudden ...

When animals are confronted by a threat, there is a physiological response; heart rate and breathing rates increase, and glucose floods the body to provide it with the energy for what comes next. We ...