Which of the following statements is correct concerning the parasympathetic division of the autonomic nervous system (ANS)?

• A. It increases heart rate and blood pressure.
• B. It primarily uses the neurotransmitter norepinephrine.
• C. It promotes 'rest and digest' activities.
• D. It is responsible for the 'fight or flight' response.

Answer: (C)

Verified step by step guidance

1. Understand the role of the parasympathetic division of the autonomic nervous system (ANS). It is primarily responsible for promoting 'rest and digest' activities, which include conserving energy and maintaining bodily functions during restful periods.
2. Recognize that the parasympathetic division typically decreases heart rate and blood pressure, as opposed to increasing them. This is in contrast to the sympathetic division, which prepares the body for 'fight or flight' responses.
3. Identify the primary neurotransmitter used by the parasympathetic division, which is acetylcholine, not norepinephrine. Norepinephrine is mainly associated with the sympathetic division.
4. Differentiate between the 'rest and digest' activities of the parasympathetic division and the 'fight or flight' response of the sympathetic division. The parasympathetic division helps in digestion, energy conservation, and relaxation.
5. Conclude that the correct statement concerning the parasympathetic division of the ANS is that it promotes 'rest and digest' activities, as it aligns with its primary functions and neurotransmitter usage.