Normally, urine is prevented from backing up into the ureters from a full bladder due to:
A) gravity.
B) hydrostatic pressure from the renal pelvis.
C) sphincters (anatomical valves) at the junctions of the ureters and bladder.
D) physiological valves where pressure in the bladder compresses oblique openings into the ureters.

Question

Quizplus · Accepted Answer

Physiological valves at the junctions of the ureters and bladder prevent backflow by compressing the ureteral openings when bladder pressure increases.

Normally, Urine Is Prevented from Backing Up into the Ureters