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USMLE Step 1 Review- 22



Q- Secretion of which one of the following hormones is decreased due to renal failure?

A- Erythropoietin

B- Glucagon

C- Insulin

D- Thyroxin

A- Erythropoietin- It is the only hormone on the list secreted by the kidney. It stimulates erythrocyte production in the bone marrow.



Q- High levels of which one of the following substances signals the initiation of gluconeogenesis?

A-Acetyl CoA

B- Adenosine triphosphate (ATP)

C- Citrate

D- Oxalate

A- Acetyl CoA- The primary control of gluconeogenesis is exerted by acetyl-CoA. The first step is controlled by pyruvate carboxylase which does not function in the absence of Acetyl-CoA.



Q- Which one of the following viruses is responsible for the development of viral myocarditis?

A- Adenovirus

B- Coxsackie B virus

C- Mumps virus

D- Rhinovirus

B- Coxsackie B virus- It is the most common causative organism of viral myocarditis. It may be preceded by respiratory or gastrointestinal symptoms.



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