ATI LPN
Multiple Choice Questions on Urinary System Questions
Question 1 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 2 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 3 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.
Question 4 of 5
A hospitalized patient who has possible renal insufficiency after coronary artery bypass surgery will have a creatinine clearance test. Which item will the nurse need to obtain?
Correct Answer: D
Rationale: Because creatinine clearance testing involves a 24-hour urine specimen, the nurse should obtain a large container for the urine collection. Catheterization, cleaning of the perineum with antiseptic towelettes, and a sterile specimen cup are not needed for this test.
Question 5 of 5
What is the structural and functional unit of the kidney?
Correct Answer: D
Rationale: The nephron (D) is the kidney's structural and functional unit, where urine formation occurs across its ~1 million units per kidney. The cortex (A) and medulla (B) are regions, and pyramids (C) are medullary structures, but only the nephron performs filtration, reabsorption, and secretion, making D the correct answer.