What prevents backflow of urine into the ureters when the pressure inside the urinary bladder increases during micturition?
A)the internal ureteral sphincter muscle
B)high fluid pressure in the renal pelvis
C)a physiological valve created at the distal ends of the ureters as they pass under the urinary bladder
D)continued active peristalsis of the ureter during urination
E)gravity

Question

Quizplus · Accepted Answer

The prevention of urine backflow into the ureters during micturition is achieved through a physiological valve mechanism created at the distal ends of the ureters as they pass obliquely through the bladder wall. This mechanism prevents urine from flowing backward into the kidneys when bladder pressure increases during urination.

What Prevents Backflow of Urine into the Ureters When the Pressure