Kaplan Nursing Entrance Exam Practice 2026 – Comprehensive Prep

The sympathetic nervous system is responsible for the body's 'fight or flight' response, which is activated during stressful situations or perceived threats. This response prepares the body to either confront or flee from danger, triggering a series of physiological changes. When activated, it increases heart rate, dilates airways, and boosts blood flow to muscles, among other effects. These changes enhance the body's ability to respond quickly and effectively in emergencies.

In contrast, the 'rest-and-digest' response is associated with the parasympathetic nervous system, which promotes relaxation and recovery. The options related to calm and relax, as well as social interaction, are also functions of the parasympathetic system and do not reflect the immediate and alert state induced by sympathetic activation. Therefore, it is clear that the 'fight or flight' response is the accurate portrayal of what happens when the sympathetic nervous system is stimulated.