What physiological changes does the sympathetic nervous system activate?

The sympathetic nervous system is a crucial component of the autonomic nervous system, responsible for preparing the body to respond to stressful situations through the "fight-or-flight" response. When activated, it stimulates various physiological changes, such as increased heart rate, dilated airways, and heightened blood flow to the muscles, all aimed at enhancing the body's ability to respond to perceived threats. This response is vital for survival, as it primes the body for immediate action.

The option related to the fight-or-flight response correctly reflects the key function of the sympathetic nervous system. It illustrates how the body's systems are mobilized to react to stressors effectively, providing energy and alertness needed in emergencies.