USMLE Question #21: Von Gierke Disease and Glucose-6-Phosphatase (Answer)

This is the answer and explanation for USMLE Question #21 from the Dr. Ray Makar Facebook page. Try it first, then check your answer below. The Question A 6-month-old infant has fasting hypoglycemia, a large liver, lactic acidosis, high uric acid and high triglycerides. Which enzyme is deficient? A. Glucose-6-phosphataseB. Lysosomal acid α-glucosidaseC. Muscle glycogen … Read more

USMLE Question #20: Severe Preeclampsia and Magnesium Sulfate (Answer)

This is the answer and explanation for USMLE Question #20 from the Dr. Ray Makar Facebook page. Try it first, then check your answer below. The Question A 29-year-old woman at 33 weeks of pregnancy has a blood pressure of 166/112 mm Hg, severe headache and proteinuria. Which drug should be given to prevent seizures? … Read more

USMLE Question #19: Melanoma Prognosis and Breslow Thickness (Answer)

This is the answer and explanation for USMLE Question #19 from the Dr. Ray Makar Facebook page. Try it first, then check your answer below. The Question A biopsy of an irregular, multicolored pigmented lesion on the back confirms malignant melanoma. Which factor is most important for prognosis? A. Breslow thickness (depth of invasion)B. Diameter … Read more

USMLE Question #18: High Altitude and Respiratory Alkalosis (Answer)

This is the answer and explanation for USMLE Question #18 from the Dr. Ray Makar Facebook page. Try it first, then check your answer below. The Question A healthy man flies from sea level to a city at 4,000 meters. Which acid–base change develops first? A. Metabolic acidosisB. Metabolic alkalosisC. Respiratory acidosisD. Respiratory alkalosis Correct … Read more