During the alarm reaction stage of the General Adaptation Syndrome, which system is activated?

• A. Digestive system
• B. Immune system
• C. Sympathetic nervous system activated
• D. Muscular system

Answer: (C)

The alarm reaction stage triggers the fight-or-flight response by activating the sympathetic nervous system. This quick, coordinated activation prepares the body to respond to a threat: adrenaline and noradrenaline are released, heart rate and respiration increase, pupils dilate, and energy is mobilized to muscles. Digestion slows as blood flow is redirected away from the gut, and immune system changes occur more slowly and indirectly rather than being the immediate focus. While muscles are energized as a result of these changes, the system driving the immediate response is the sympathetic nervous system.