What is the mechanism of action of dextromethorphan in treating coughs?
A) Works on CNS to suppress cough centers in the medulla oblongata.
B) Elevates the threshold for cough in the medulla oblongata.
C) Thins mucus and lubricates the irritated respiratory tract.
D) Acts as vasoconstrictor and shrinks dilated blood vessels.
A
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What is the BEST way to gain a parent's confidence?
A) Speak in a way that is firm and direct to minimize her panic. B) Use adult-sized equipment on the child and explain that it will work better. C) Show your competence and compassion while managing her child. D) Tell her that everything is going to be okay and rush the child to the squad.
A blood specimen could not be focused on oil immersion although it could be focused on both ´10 and ´40. What is the most likely cause?
a. The pH of the stain is too acidic. b. The specimen is too thick. c. Something is wrong with the oil lens. d. The specimen is probably upside down.