Which branch enables the fight-or-flight response?

Which branch enables the fight-or-flight response?

• A. Parasympathetic
• B. Enteric
• C. Somatic
• D. Sympathetic

Answer: (D)

When the body needs to respond quickly to danger or stress, the sympathetic division of the autonomic nervous system kicks in. This branch activates the fight-or-flight response by speeding up the heart rate and breathing, widening airways, releasing glucose for energy, and redirecting blood flow to the muscles. It gears the body up to take action. In contrast, the parasympathetic division promotes rest, digestion, and recovery after a threat is gone, effectively calming the body. The enteric nervous system manages the gut’s own local circuits, largely independent of direct control, while the somatic system governs voluntary movements and conscious actions. So the branch responsible for enabling fight-or-flight is the sympathetic nervous system.

When the body needs to respond quickly to danger or stress, the sympathetic division of the autonomic nervous system kicks in. This branch activates the fight-or-flight response by speeding up the heart rate and breathing, widening airways, releasing glucose for energy, and redirecting blood flow to the muscles. It gears the body up to take action. In contrast, the parasympathetic division promotes rest, digestion, and recovery after a threat is gone, effectively calming the body. The enteric nervous system manages the gut’s own local circuits, largely independent of direct control, while the somatic system governs voluntary movements and conscious actions. So the branch responsible for enabling fight-or-flight is the sympathetic nervous system.