The current gold standard functional imaging modality for evaluating Pheochromocytoma is

Correct Answer: D

Rationale: MIBG scintigraphy is the gold standard for pheochromocytoma targets catecholamine uptake, specific for functionality. MRI/CECT show anatomy less functional. FDG PET detects metabolism non-specific, malignant focus. MIBG's specificity distinguishes it, critical for localizing active tumors, unlike structural or metabolic imaging.

Correct Answer: C

Rationale: Serum PSA strongly predicts BPH progression reflects prostate volume, risk of acute retention/surgery. Age correlates less specific. Flow rates indicate obstruction variable progression link. Symptom score (IPSS) tracks bother not progression strength. PSA's predictive power distinguishes it, critical for risk stratification, unlike age, flow, or symptom metrics.

Correct Answer: A

Rationale: The efferent arteriole carries blood from the glomerulus to peritubular capillaries/vasa recta, not those vessels or interlobular vein (later drainage). This distinguishes glomerular outflow, vital for filtration dynamics, contrasting with downstream vessels.

Correct Answer: C

Rationale: Average urine output is 1.5 L/day (varies 1-2 L), not 12 L (excessive), 100 mL (too low), or 3 L (high). This measures excretory output, vital for fluid balance, contrasting with extremes.

Correct Answer: B

Rationale: Aldosterone boosts sodium reabsorption in DCT/collecting duct, not elimination, potassium (excreted), or chloride (follows). This defines aldosterone's role, vital for blood volume, contrasting with opposite effects.