Urine Is Prevented from Flowing Back into the Ureters from the Bladder

question 17

Multiple Choice

Urine is prevented from flowing back into the ureters from the bladder by ________.

• A) compression of the ureteral openings
• B) the external urethral sphincter
• C) the internal urethral sphincter
• D) the ureteral sphincters
• E) ureteral valves

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