Which statement best describes the parasympathetic system?

• A. Regulates hormones
• B. Maintains body temperature
• C. Controls reflexes
• D. Promotes Rest and Digest activities

Answer: (D)

The parasympathetic system is the part of the autonomic nervous system that dominates during calm, resting states, guiding the body to conserve energy and perform maintenance functions. It promotes Rest and Digest activities, such as slowing the heart rate, increasing digestion and saliva production, and facilitating elimination and nutrient absorption. This is why the statement describing it as promoting Rest and Digest activities is the best fit.

Other options aren’t its primary role. Hormones are regulated mainly by the endocrine system, not the parasympathetic division. Body temperature regulation involves the hypothalamus and various mechanisms beyond the parasympathetic system alone. Reflexes are primarily managed by the spinal cord and brainstem pathways, not by the parasympathetic system as a general statement.