alleryStart learning →The trigone at the base of the bladder is marked out by which three openings?
ATwo renal pelves and one ureter
BTwo urethral orifices and one ureter
CThree separate ureteral openings
DTwo ureteral openings and the urethra
Answer & Solution
Correct answer: D. Two ureteral openings and the urethra
1. The two ureters deliver urine into the bladder through separate openings.
2. The urethra begins inferior and central to those two openings.
3. Those three points mark out a triangular area at the base of the bladder called the trigone.
4. There is one urethra and two ureters, so options built from two urethral orifices or three ureters cannot describe it.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.2 Gross Anatomy of Urine Transport_
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