Repeated USMLE Questions Step 1- Review- 31

Q- A 60-year-old man complains of shortness of breath. Examination reveals bilateral pleural effusions and pitting edema up to the thighs’ level.

Which of the following is the most likely laboratory finding in this patient?

A- Anemia

B- Hypoalbuminemia

C- Hypoglycemia

D- Neutrophilia

B- Hypoalbuminemia- Low oncotic pressure due to low serum protein leads to accumulation of extravascular fluids resulting in pleural effusion and severe edema.

Q- Which one of the following types of cells is programmed to destroy cells the fail to display MHC class 1 antigen properly?

A- B lymphocyte

B- CD4 lymphocyte

C- CD8 lymphocyte

D- Natural killer cells

D- Natural killer cells- These cells play an important role in clearing viral infections if the virus downregulates MHC expression.

Q- Which one of the following fetal structures transfer oxygenated blood from the umbilical vein to the inferior vena cava and becomes ligamentum venosum after birth?

A- Azygous vein

B- Ductus arteriosus

C- Ductus venosus

D- Umbilical artery

C- Ductus venosus

Other Repeated USMLE Step 1 Questions 

2 thoughts on “Repeated USMLE Questions Step 1- Review- 31”

  1. Thank you so much Dr. Mohammad

  2. These are so nice learning questions and learned more from them

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