Which of the following is NOT a function of the sympathetic nervous system?

The sympathetic nervous system is part of the autonomic nervous system and is primarily responsible for the body's 'fight or flight' response. Its primary functions include preparing the body to respond to perceived threats by increasing heart rate, dilating pupils, and increasing blood flow to muscles to enhance physical capabilities.

Stimulating digestion is not a function of the sympathetic nervous system; in fact, it is primarily managed by the parasympathetic nervous system, which promotes the 'rest and digest' state. During times of stress or danger, the sympathetic nervous system inhibits digestive activity, redirecting blood and energy toward systems that can help in immediate, survival-oriented responses. Understanding this distinction is crucial in recognizing how the two branches of the autonomic nervous system work in an opposing manner to maintain homeostasis in the body.