Urinary system Maintains fluid homeostasis except:

Correct Answer: D

Rationale: Urinary system regulates pH, pressure, volume not perspiration (skin). This excludes non-renal function, key for system roles, contrasting with sweat glands.

Correct Answer: C

Rationale: ADH triggers water reabsorption, concentrating urine, not secretion or dilution. This defines ADH effect, vital for water balance, contrasting with opposite outcomes.

Correct Answer: C

Rationale: Renin comes from JG cells in JGA (not listed, but adrenal cortex mislisted), not macula densa, aorta, or medulla. 'C' assumed typo. This corrects renin source, vital for RAAS, contrasting with options.

Correct Answer: A

Rationale: Ureter links kidney to bladder, not urethra (bladder out), pelvis (inside), or duct (nephron). This identifies transport tube, key for urine flow, contrasting with other structures.

Correct Answer: C

Rationale: Nephron sequence: glomerulus → PCT → loop → DCT, not other orders. This orders filtrate flow, key for processing, contrasting with missequences.