The parasympathetic nervous system is associated with which function?

• A. Fight or Flight
• B. Sexual Arousal
• C. Rest and Digest
• D. Digestion

Answer: (C)

The parasympathetic nervous system is the branch of the autonomic system that promotes energy conservation and maintenance during relaxed states. It supports processes that run "rest and digest," such as slowing the heart rate, increasing digestive secretions and motility, and promoting nutrient absorption and tissue repair. This is why the overarching function is described as resting and conserving energy.

Digestion is one important effect of the parasympathetic system, but describing its role as “rest and digest” captures the broader, overall purpose. Fight or flight describes the sympathetic response, not the parasympathetic. Sexual arousal can involve parasympathetic activity, but it isn’t the defining broad function of this division.