Multiple choice

Ureteric peristalsis is due to

  1. sympathetic innervation

  2. parasympathetic innervation

  3. both sympathetic and parasympathetic innervation

  4. pacemaker activity of the smooth muscle cells in the renal pelvis
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D Correct answer
Explanation

Ureteric peristalsis is an intrinsic property of the ureter, originating from pacemaker cells located in the renal pelvis. While autonomic innervation (both sympathetic and parasympathetic) can modulate the frequency and strength of contractions, it is not the primary driver. The smooth muscle cells themselves generate the rhythmic contractions that propel urine from the kidneys to the bladder.

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