ATI RN
Urinary System Mcq Questions Questions
Question 1 of 5
In the presence of vasopressin, the greatest fraction of filtered water is absorbed in the:
Correct Answer: A
Rationale: PCT reabsorbs ~65-70% of water (obligatory), even with vasopressin not loop, DCT, or collecting duct (facultative). This quantifies water reabsorption, critical for fluid balance, contrasting with ADH-focused sites.
Question 2 of 5
Which of the following is the proper sequence of structures in the nephron?
Correct Answer: C
Rationale: Nephron sequence: glomerulus → PCT → loop → DCT not other orders. This orders filtrate flow, key for processing, contrasting with missequences.
Question 3 of 5
Production of less than 50 mL/day of urine is called ________.
Correct Answer: D
Rationale: Anuria is <50 mL/day not normal (~1-2 L), polyuria (excess), or oliguria (100-400 mL). This defines severe reduction, key for renal failure, contrasting with higher outputs.
Question 4 of 5
What are the names of the capillaries following the efferent arteriole?
Correct Answer: C
Rationale: Peritubular (cortex) and vasa recta (medulla) follow efferent arteriole not arcuate, interlobar, or medullary alone. This specifies post-glomerular flow, key for reabsorption, contrasting with other vessels.
Question 5 of 5
Progesterone can bind to receptors for which hormone that, when released, activates water retention?
Correct Answer: A
Rationale: Progesterone mimics aldosterone (Na+/water retention) not ADH (water), PTH (Ca2+), or ANH (natriuretic). This specifies cross-reactivity, critical for fluid balance, contrasting with direct water hormones.