ATI RN
Urinary System Mcq Questions Questions
Question 1 of 5
The urinary bladder is:
Correct Answer: A
Rationale: Bladder (vesicourethral canal) is endodermal not mesodermal (trigone), ectodermal, all, or mixed; cloacal endoderm forms it. This defines germ layer, key for embryology, contrasting with mesodermal trigone.
Question 2 of 5
List the organs of the urinary system in order from urine production to excretion.
Correct Answer: B
Rationale: Order is kidneys (production), ureters (transport), bladder (storage), urethra (excretion) e.g., anatomical flow. Urethra before bladder reverses impossible. Bladder first ignores production false. Correct sequence distinguishes it, key to urinary path, unlike disordered options.
Question 3 of 5
The functional structure of the kidney is the
Correct Answer: D
Rationale: The nephron is the kidney's functional unit filters, reabsorbs, secretes (e.g., ~1 million/kidney). Neurons are neural not renal. Sinusoids are liver not kidney. Trigone is bladder not functional unit. Nephron's role distinguishes it, key to kidney function, unlike unrelated structures.
Question 4 of 5
Describe urine in relationship to glomerular filtration, tubular reabsorption and tubular secretion. Urine =:
Correct Answer: D
Rationale: Urine = filtration – reabsorption + secretion e.g., 180 L filtered, 99% reabsorbed, waste added (1.8 L urine). Adding reabsorption increases volume false. Subtracting secretion removes waste wrong. Adding/subtracting reabsorption miscalculates illogical. Correct formula distinguishes it, key to urine composition, unlike additive or subtractive errors.
Question 5 of 5
The ______ limb of the Loop of Henle is impermeable to water.
Correct Answer: A
Rationale: The ascending limb is water-impermeable pumps NaCl, concentrating medulla (e.g., countercurrent multiplier). Descending is permeable water exits. Thick/thin are subsets ascending key. Impermeability distinguishes it, critical for urine concentration, unlike permeable or vague options.