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Repeated USMLE Questions Step 1- Review- 52

Q- A patient with a history of renal disease presents to the clinic for a follow up and renal function tests.  Clearance of which one of the following substances is used to estimate the glomerular filtration rate?

A-Calcium

B-Inulin

C-Potassium

D-Sodium

B-Inulin- It is neither reabsorbed nor secreted so, it is used to estimate glomerular filtration rate. Other substances are reabsorbed and/or secreted through renal pathway.



Q- An immunocompromised patient complains of fever, increasing dyspnea and cough for 2 weeks. Cytologic examination of his bronchoalveolar lavage shows enlarged cells with prominent intranuclear inclusions.

Which of the following is most likely the causative organism?

A-Candida albicans

B-Cytomegalovirus

C-Pneumocystis jirovecii

D-Respiratory syncytial virus

B-Cytomegalovirus- This clinical picture and cytologic examination of an immunocompromised patient are typical for cytomegalovirus infection.



Q- Which one of the following types of anemia is not associated with previous drug use?

A-Autoimmune hemolytic anemia

B-Aplastic anemia

C-G6PD deficiency

D-Microcytic anemia

D-Microcytic anemia- This type of anemia is not caused by drug use but is associated mainly with iron deficiency.



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