What is the primary function of the Sympathetic Nervous System?

• A. Maintain Homeostasis
• B. Regulate digestion
• C. Coordinate memory
• D. Stimulate Fight-or-Flight

Answer: (D)

The sympathetic nervous system is the body's rapid-activation system for responding to stress or danger. Its main job is to mobilize energy and resources so the body can either fight or run away. When it kicks in, heart rate and the force of heart contractions increase, airways dilate to improve breathing, blood is directed to the muscles, and glucose is released for quick energy. At the same time, digestion and other nonessential functions are slowed to conserve energy. This coordinated “fight-or-flight” response is why stimulating fight-or-flight is the best choice. The other options aren’t its primary role: maintaining homeostasis is a broader autonomic balancing task, digestion is mainly a parasympathetic function, and memory coordination is a brain process, not an autonomic motor response.