Alpha2-receptors are often used in:
A. increasing renin release from the kidneys
B. reducing blood pressure
C. raising blood pressure
D. increasing plasma concentrations of norepinephrine
b
Rationale: Alpha2-receptors are often used in reducing blood pressure. They are believed to be located on the presynaptic neurons and seem to function as controllers of neurotransmitter release by the presynaptic neurons.
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Which of the following statements concerning heart attacks and cardiac arrest is NOT true?
A) Some patients who have heart attacks live active and healthy lifestyles. B) Many patients may mistake their symptoms for other causes such as indigestion. C) The most common initial rhythm in sudden cardiac death is asystole. D) Heart attacks present differently among women and men.
Which of the following pathogens can lie dormant in the body but reemerge under times of stress?
A) Hepatitis B) Fungi C) Giardia lamblia D) Herpes viruses