The sympathetic nervous system responds to perceived threats.

• A. Perceived
• B. Real threats
• C. Imagined threats
• D. Potential threats

Answer: (A)

The main idea here is that the autonomic fight-or-flight response is driven by how the brain interprets a situation as threatening, not by objective danger alone. When the brain perceives a threat, signals are sent that activate the sympathetic division, preparing the body for action. This means you don’t have to be facing an objectively real danger for the system to kick in—the perception of danger is enough to trigger the response. That perception can come from actual danger, something you imagine, or a situation you anticipate.

That’s why “perceived” threats is the best choice. It captures the idea that the body responds to the brain’s appraisal of danger, whatever form that threat takes. Imagined threats fit under perceived threats, but using the broader term emphasizes that the trigger is perception itself, not the external reality. Real threats would also cause a response, but limiting it to real threats misses the core point that the perception of danger—whether real or imagined—drives the reaction. Potential threats are possibilities and may influence perception, but the immediate driver of the sympathetic response is the perception of threat.