What is the potential consequence of the sympathetic system activation?

The activation of the sympathetic nervous system is part of the body's "fight or flight" response, which prepares an individual to react to perceived threats or stressors. When this system is activated, several physiological changes occur that enhance an individual's readiness for immediate action. This includes increased heart rate, elevated blood pressure, and heightened alertness, which together prepare the body to either confront the threat or escape from it.

In contrast, options such as calmness and relaxation, enhanced digestion, and reduction in blood pressure are associated with the parasympathetic nervous system, which operates by calming the body down and conserving energy after a stress response. This further illustrates the role of the sympathetic system in preparing the body for a quick response, thus making increased readiness for action the correct answer regarding the potential consequences of its activation.