Repeated USMLE Questions Step 1- Review- 37- Pharmacology

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Q- Which one of the following medications acts by lowering heart rate and contractility resulting in decreased oxygen consumption?

A-Captopril

B-Digoxin

C-Metoprolol

D-Verapamil

C-Metoprolol- This is a selective beta blocker which acts by lowering heart rate and contractility leading to lower oxygen consumption. Other choices act through different mechanisms.



Q- Which one of the following structures is a part of the sympathetic nervous system but innervated by cholinergic fibers?

A-Adrenal medulla

B-Lacrimal glands

C-Renal vascular smooth muscle

D-Urinary bladder

A-Adrenal medulla- It is the only one that is a part of the sympathetic nervous system. The other choices are innervated by the parasympathetic nervous system.



Q- Which one of the following antiviral medications is a neuraminidase inhibitor?

A-Acyclovir

B-Lopinavir

C-Oseltamivir

D-Ritonavir

C-Oseltamivir- It is the only one on the list that is neuraminidase inhibitor. Acyclovir is a DNA polymerase inhibitor and both lopinavir and ritonavir are protease inhibitors.

 

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