Radioactive iodine uptake in excess of 50 is usual

ATI LPN

ATI LPN Test Bank

Radioactive iodine uptake in excess of 50% is usually observed in the course of:

A. acute thyroiditis B. myxedema C. iodine therapy D. thyrotoxicosis

Correct Answer: D

Rationale: Thyrotoxicosis (e.g., Graves' disease) typically shows RAI uptake >50% due to increased thyroid activity.

Common causes of stupor and coma include:

A. intoxication with alcohol and drugs B. supra or subtentorial lesion C. infection D. all of these

Correct Answer: D

Rationale: All listed causes "toxic, structural, infectious, and metabolic "can lead to stupor or coma.

In hyperparathyroidism all of the following are seen except:

A. absent lamina dura B. hyperreflexia C. increased alkaline phosphatase D. decreased serum phosphorus

Correct Answer: B

Rationale: Hyperparathyroidism causes hyporeflexia (from hypercalcemia), not hyperreflexia; other findings are typical.

Tendon xanthomas and an elevated serum cholesterol is characterized of:

A. liver disease B. diabetes C. nephritic syndrome D. diabetes

Correct Answer: C

Rationale: Nephrotic syndrome features hypercholesterolemia and xanthomas due to lipid loss and compensatory synthesis.

The one of the following which does not occur in a patient receiving cortisone or corticotropin is:

A. peptic ulcer B. psychosis C. retention of potassium D. glycosuria

Correct Answer: C

Rationale: Cortisone causes potassium loss (hypokalemia), not retention, via mineralocorticoid effects.

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