Which term refers to the division of the autonomic nervous system that involves 'fight or flight' responses?

The term that refers to the division of the autonomic nervous system that involves 'fight or flight' responses is the sympathetic division. This part of the autonomic nervous system is activated in situations of stress or danger, leading to physiological changes that prepare the body to respond to perceived threats. These changes can include an increased heart rate, dilated pupils, and redirected blood flow to the muscles, among other responses.

In contrast, the parasympathetic division primarily facilitates the 'rest and digest' processes that occur when the body is at rest, promoting relaxation and recovery. Cognitive and central do not pertain to the autonomic nervous system in the context of stress responses, as they relate more to mental processes and the brain and spinal cord, respectively. Therefore, the sympathetic division is specifically identified with the 'fight or flight' response due to its role in rapidly preparing the body to confront or flee from threats.