ATI LPN
Multiple Choice Questions on Urinary System Questions
Question 1 of 5
Concerning the function of the proximal tubule:
Correct Answer: D
Rationale: The proximal tubule reabsorbs ~65% of filtrate iso-osmotically (A), PAH concentration rises as it's secreted (B is false), and glucose/bicarbonate are mostly reabsorbed (C). A and C are true—reabsorption is iso-osmotic, nutrients are reclaimed—while B is incorrect, making D (A and C are correct) the answer.
Question 2 of 5
The process of micturition or urination:
Correct Answer: C
Rationale: Micturition is a sacral reflex (S2-S4) (C), contracting the detrusor (not relaxing, A) and relaxing sphincters. The external sphincter relaxes, not contracts (B), during voiding, making C the correct process description.
Question 3 of 5
What would happen to the GFR if the hydrostatic pressure exerted by the fluid in the capsular space increased?
Correct Answer: B
Rationale: Increased capsular hydrostatic pressure (B) opposes glomerular filtration pressure, reducing GFR. Increase (A) contradicts this resistance, and no change (C) ignores the balance, making B correct.
Question 4 of 5
Which of the following is NOT a unit of the nephron?
Correct Answer: D
Rationale: The medullary papilla (D) is a renal pyramid
Question 5 of 5
Which action will the nurse include in the plan of care for a patient who has had a ureterolithotomy and has a left ureteral catheter and a urethral catheter in place?
Correct Answer: D
Rationale: Sudden drop in ureteral catheter output (D) may signal obstruction, requiring immediate provider notification to prevent renal damage. Home care (A) isn't typical (ureteral catheters are temporary), tension (B) risks displacement, and clamping (C) increases pressure, making D critical.