What is the primary functional state associated with the sympathetic nervous system?

What is the primary functional state associated with the sympathetic nervous system?

• A. Fight-or-flight (activation).
• B. Rest-and-digest (calming).
• C. Quiescent, minimal activity.
• D. Neutral, non-specific arousal.

Answer: (A)

The sympathetic nervous system is geared toward preparing the body for action by rapidly mobilizing energy and increasing alertness. When it’s activated, you get the classic fight-or-flight response: heart rate and force of contraction rise, airways dilate to improve airflow, pupils enlarge, blood is redirected to muscles, glucose and fatty acids are released for quick energy, and digestion slows. Sweat glands may activate, and the adrenal medulla can release epinephrine to amplify these effects. This coordinated set of changes is what people refer to as the fight-or-flight state. In contrast, the rest-and-digest state belongs to the parasympathetic system, which promotes conservation and recovery. The idea of quiescent or neutral arousal doesn’t capture the active mobilization characteristic of sympathetic activation.

The sympathetic nervous system is geared toward preparing the body for action by rapidly mobilizing energy and increasing alertness. When it’s activated, you get the classic fight-or-flight response: heart rate and force of contraction rise, airways dilate to improve airflow, pupils enlarge, blood is redirected to muscles, glucose and fatty acids are released for quick energy, and digestion slows. Sweat glands may activate, and the adrenal medulla can release epinephrine to amplify these effects. This coordinated set of changes is what people refer to as the fight-or-flight state.

In contrast, the rest-and-digest state belongs to the parasympathetic system, which promotes conservation and recovery. The idea of quiescent or neutral arousal doesn’t capture the active mobilization characteristic of sympathetic activation.