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.
