What does the term 'fight or flight response' refer to?

The term 'fight or flight response' refers to a physiological reaction that occurs in response to perceived threats or danger. This biological mechanism is activated by the autonomic nervous system, particularly when the body perceives a stressor. During this response, various physiological changes take place, such as an increase in heart rate, heightened blood pressure, and the release of stress hormones like adrenaline. These changes prepare the organism to either confront the threat (fight) or flee from it (flight), allowing for a quick reaction to a stressful situation.

Understanding this concept is crucial in biopsychology as it highlights the body's innate survival mechanisms, connecting physiological responses with behavior in the context of stress and danger. This response is vital for survival and illustrates how human beings (and animals) are hardwired to respond to threats in ways that enhance their chances of survival.