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A patient in the intensive care unit is given dexmedetomidine.Which therapeutic outcome may result from this medication?


A) vasoconstriction and increased blood pressure
B) analgesia and sedation
C) increased cardiac output
D) muscle relaxation
E) bronchodilation

F) B) and D)
G) A) and B)

Correct Answer

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B

Phenylephrine is contained in many nasal decongestant products.Which action contributes to its therapeutic effect?


A) activation of adenylyl cyclase
B) inhibition of phosphodiesterase
C) activation of phospholipase C
D) activation of nitric oxide synthase
E) inhibition of adenosine deaminase

F) B) and D)
G) A) and B)

Correct Answer

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C

A patient with heart failure is given an intravenous dobutamine infusion to reduce impedance to left ventricular ejection.Which receptors mediate this effect of dobutamine?


A) dopamine D₁ receptors
B) α₁-adrenoceptors
C) α₂-adrenoceptors
D) β₁-adrenoceptors
E) β₂-adrenoceptors

F) A) and E)
G) B) and C)

Correct Answer

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E

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