ATI RN
Urinary System Mcq Questions Questions
Question 1 of 5
Which of the following crystalloids are major constituents in 75-85% of renal calculi plus calcium:
Correct Answer: C
Rationale: Most renal calculi (75-85%) are calcium oxalate or phosphate not cystine (rare), urate (less common), or mixed. This distinguishes stone composition, vital for treatment, contrasting with minority types.
Question 2 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 3 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 4 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.
Question 5 of 5
The hallmark of bladder outlet obstruction is
Correct Answer: D
Rationale: Bladder outlet obstruction (BOO) shows high pressure, low flow on urodynamics effort against resistance (e.g., BPH). Low pressure/low flow suggests detrusor underactivity opposite. Incomplete emptying and high residuals are results, not hallmarks secondary. High pressure/low flow distinguishes BOO, key to its urodynamic signature, unlike underactivity or outcome-focused options.