alleryStart learning →What drives urine along the ureter into the bladder?
APeristaltic contractions of smooth muscle
BGravity acting on the column of urine
CSuction generated by the empty bladder
DCiliary beating along the ureter lining
Answer & Solution
Correct answer: A. Peristaltic contractions of smooth muscle
1. Urine does not simply drain down the ureter under its own weight.
2. Longitudinal and circular smooth muscle in the ureter wall generates peristaltic waves.
3. Those waves propel urine into the bladder without the aid of gravity.
4. That is why a person lying flat still moves urine from kidney to bladder normally.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.2 Gross Anatomy of Urine Transport_
Keep practising The Urinary System
Browse all The Urinary System questions for NEET PG, or explore more Physiology topics.
Related questions
How many times over is the entire blood volume filtered through the kidneys in a day?What proportion of hospitalised patients does acute kidney injury affect?What happens to the bladder in late pregnancy?What is sodium's place in determining plasma osmolarity?What is a diuretic?If no further water reabsorption happened beyond the distal tubule, roughly how much urineWhen the kidney deaminates glutamine, what does the body gain and what does it lose?Which statement describes simple diffusion in the nephron?