ATI RN
Urinary System Mcq Questions Questions
Question 1 of 5
The mesonephros cranial to its junction with the ureteric bud gives the following:
Correct Answer: A
Rationale: Mesonephros cranial to ureteric bud forms male genital ducts (epididymis, vas) not female, paramesonephric (Mullerian), or utricle (sinus derivative). This distinguishes embryonic urogenital development, key for sex differentiation, contrasting with female structures.
Question 2 of 5
Medications associated with renal calculus formation are all EXCEPT
Correct Answer: D
Rationale: Acetohydroxamic acid prevents stones (inhibits urease in struvite cases), not causes them therapeutic role. Topiramate (anticonvulsant) alkalinizes urine, forming calcium phosphate stones. Triamterene (diuretic) crystallizes directly drug stones. Ephedrine (stimulant) links to stones via dehydration risk factor. Acetohydroxamic's preventive action distinguishes it, critical for infection stones, unlike stone-inducing drugs.
Question 3 of 5
Major neuropeptides that promote Erectile function include all EXCEPT
Correct Answer: D
Rationale: Serotonin typically inhibits erection counteracts arousal, not a promoter. Dopamine enhances desire and erection (central). Oxytocin supports penile response (peripheral). Nitric oxide (NO) drives vasodilation key mediator. Serotonin's inhibitory role distinguishes it, critical for understanding erectile balance, unlike facilitatory neuropeptides.
Question 4 of 5
The definitive kidney 'metanephros' develop at
Correct Answer: C
Rationale: Metanephros, the definitive kidney, begins at week 4 ureteric bud meets metanephric blastema, forming nephrons. Week 2 is pre-renal (pronephros starts). Week 3 sees mesonephros temporary. Week 1 lacks renal development too early. Fourth-week onset distinguishes metanephros, key to permanent kidney formation, unlike earlier stages.
Question 5 of 5
A 26 year female reports constant leakage of urine per vagina following an emergency caesarean section for foetal distress during labour. Her vitals are stable and physical examination reveals no abnormalities. Ultrasound demonstrates bilateral normal kidneys and bladder. The most likely diagnosis is
Correct Answer: D
Rationale: Vesicouterine fistula fits constant leakage post-C-section uterine incision injures bladder, leaking into uterus/vagina, less common but specific. Ureterovaginal shows flank pain kidneys normal here. Urethrovaginal is trauma-related vaginal delivery, not C-section. Vesicovaginal is commoner (obstructed labor), but uterine link post-C-section points elsewhere. Vesicouterine's surgical etiology distinguishes it, key to this scenario, unlike ureteral, urethral, or labor causes.