The parasympathetic nervous system has an inhibitory effect on most organs. However, certain activities which are inhibited by the sympathetic system are accelerated by the parasympathetic system. Which of the following set of activities is accelerated by the parasympathetic system?

The parasympathetic nervous system is responsible for the "rest and digest" state of the body. It promotes activities that conserve energy and maintain basic bodily functions.

Constriction of the pupil is caused by the contraction of the circular muscles of the iris, which is stimulated by the parasympathetic nervous system.

Peristalsis, the rhythmic contraction of the digestive tract, is enhanced by the parasympathetic nervous system to facilitate digestion, whereas the sympathetic nervous system inhibits it.

Micturition (urination) is promoted by the parasympathetic nervous system, which stimulates the contraction of the detrusor muscle of the urinary bladder and the relaxation of the internal urethral sphincter.

Conversely, heart rate and arterial blood pressure are decreased by the parasympathetic nervous system and increased by the sympathetic nervous system.

Answer: Constriction of pupil, Peristalsis and Micturition.