Which nerve system component is primarily responsible for preparing the body for action during stress?

Which nerve system component is primarily responsible for preparing the body for action during stress?

• A. Sympathetic nervous system
• B. Parasympathetic nervous system
• C. Central nervous system
• D. Peripheral nervous system

Answer: (A)

The main idea is the body's automatic gearing up for action through the sympathetic division of the autonomic nervous system. When a stressor is detected, this system triggers fight-or-flight responses: heart rate and respiration rise, pupils dilate, blood is redirected to muscles, glucose is released for quick energy, and digestion slows. All of these changes prepare you to respond quickly or confront a threat. The parasympathetic system does the opposite, promoting rest and recovery, so it isn’t the one primed for immediate action. The central nervous system (brain and spinal cord) processes and coordinates responses, while the peripheral nervous system includes nerves outside the CNS but isn’t the specific driver of the rapid mobilization during stress. So the sympathetic nervous system is the component responsible for preparing the body for action during stress.

The main idea is the body's automatic gearing up for action through the sympathetic division of the autonomic nervous system. When a stressor is detected, this system triggers fight-or-flight responses: heart rate and respiration rise, pupils dilate, blood is redirected to muscles, glucose is released for quick energy, and digestion slows. All of these changes prepare you to respond quickly or confront a threat. The parasympathetic system does the opposite, promoting rest and recovery, so it isn’t the one primed for immediate action. The central nervous system (brain and spinal cord) processes and coordinates responses, while the peripheral nervous system includes nerves outside the CNS but isn’t the specific driver of the rapid mobilization during stress. So the sympathetic nervous system is the component responsible for preparing the body for action during stress.