Which part of the autonomic nervous system is involved in Micturition process?

Explanation

When the urinary bladder gets filled with urine, the stretch receptors in the urinary bladder are stimulated. Stretching of the urinary bladder stimulates the central nervous system via the sensory neurons of the parasympathetic nervous system and brings about contraction of the bladder. Simultaneously somatic motor neurons induce the sphincters to close. Smooth muscles contract and opening of the internal sphincters occurs passively and external sphincter relaxes. When the stimulatory and inhibitory controls exceed the threshold, the sphincter opens and urine is expelled out.