When a person is withdrawing from a stimulant, what effect might the sympathetic system have?

When someone is withdrawing from a stimulant, the effects on the sympathetic nervous system can include insomnia and increased heart rate. Stimulants typically elevate the activity of the sympathetic nervous system, which is responsible for the body's fight-or-flight response. During withdrawal, as the influence of the stimulant wanes, the body can experience a rebound effect where the sympathetic nervous system remains overactive, leading to symptoms like insomnia due to difficulty in relaxing and an increased heart rate as the body tries to adjust to the absence of the stimulant.

The other options describe effects that are more typical of a state of relaxation, which is not aligned with withdrawal from stimulants. For example, relaxation and drowsiness suggest an activation of the parasympathetic nervous system, while excessive perspiration and slow digestion would not reflect the typical withdrawal experience from stimulants, as these symptoms indicate a different kind of dysregulation often associated with other withdrawal scenarios. Lastly, enhancement of calm emotions is contrary to the anxiety and restlessness that can accompany stimulant withdrawal, making it an unlikely symptom in this context.