ATI RN
Urinary System Questions Questions
Question 1 of 5
Peritubular capillary network of the kidney arises from
Correct Answer: B
Rationale: Peritubular capillaries arise from efferent arterioles not afferent, intralobular (misnomer), or interlobular. This specifies post-glomerular flow, critical for reabsorption, contrasting with pre-glomerular sources.
Question 2 of 5
The mesonephros extends in:
Correct Answer: D
Rationale: Mesonephros spans thoracic to upper lumbar regions not just cervical, thoracic, lumbar, or thoracic/lumbar only; 'all' includes cervical, which fits its cranial start. This broad extent (weeks 4–8) reflects its transient excretory role, key for development, contrasting with limited regions.
Question 3 of 5
The horse-shoe kidney is prevented from ascent due to:
Correct Answer: D
Rationale: Horseshoe kidney is trapped by the inferior mesenteric artery not ureter length, pole fusion (cause), SMA, or aorta; IMA blocks ascent. This specifies obstruction, critical for anomaly, contrasting with causal or higher structures.
Question 4 of 5
The prostatic urethra is developed from:
Correct Answer: D
Rationale: Prostatic urethra forms from vesicourethral canal (upper), mesonephric ducts (mid), and pelvic sinus (lower) all contribute. 'All' fits mixed origin, critical for male anatomy, contrasting with partial sources.
Question 5 of 5
The kidneys aid in the activation of vitamin _____.
Correct Answer: B
Rationale: Kidneys activate vitamin D convert 25-hydroxy-D to calcitriol (e.g., calcium regulation). Vitamin A is liver-processed not kidney. Vitamin E is antioxidant not activated. Vitamin K is clotting-related liver role. Vitamin D's renal activation distinguishes it, critical for bone/mineral homeostasis, unlike other vitamins.