**Question:** Ureteric peristalsis is due to intact supply of

A. Sympathetic nervous system
B. Parasympathetic nervous system
C. Somatic nervous system
D. Autonomic nervous system

**Correct Answer:** **D. Autonomic nervous system**

**Core Concept:** Ureteric peristalsis is the involuntary, rhythmic contraction of the ureter, which helps in the movement of urine from the kidney to the bladder. The ureters are smooth muscle tubes, and their peristaltic movement is regulated by the autonomic nervous system.

**Why the Correct Answer is Right:** The ureters are part of the urinary system, and their function is regulated by the autonomic nervous system. The autonomic nervous system can be further divided into the sympathetic and parasympathetic divisions. Among the given options, the correct answer is D (Autonomic nervous system) because it includes both the sympathetic and parasympathetic divisions that regulate ureteric peristalsis.

**Why Each Wrong Option is Incorrect:**

A. Sympathetic nervous system: Although the sympathetic division is a component of the autonomic nervous system, it is not the main regulator of ureteric peristalsis. The parasympathetic division plays a more significant role in this process.

B. Parasympathetic nervous system: This division is responsible for the regulation of ureteric peristalsis, specifically, the acetylcholine-mediated smooth muscle contraction.

C. Somatic nervous system: The somatic nervous system controls voluntary muscle movements and is not involved in regulating ureteric peristalsis.

**Clinical Pearl:** Understanding the role of the autonomic nervous system in ureteric peristalsis is essential for clinicians as it provides insight into the pathophysiology of urinary tract dysfunction and helps in formulating appropriate treatment strategies for related clinical conditions.