Bilateral adrenalectomy results in a large depression in urinary catecholamines

Correct Answer: B

Rationale: Adrenalectomy eliminates adrenal catecholamine production, not urinary levels if extra-adrenal sources (e.g., sympathetic nerves) persist.

Correct Answer: C

Rationale: Agnosia is a failure to recognize sensory input despite intact sensation, due to cortical processing deficits.

Correct Answer: D

Rationale: Myasthenia gravis can increase urinary creatine from muscle breakdown.

Correct Answer: D

Rationale: Wernicke's (thiamine deficiency) features ocular motility issues.

Correct Answer: B

Rationale: Tay-Sachs disease predominantly affects Ashkenazi Jewish infants.