CHEMTREC is an example of a:
a. telephone hotline. c. printed reference book.
b. computerized database. d. poison control center.
a
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A patient with a rapid heart rate may have decreased cardiac output because:
A) the heart muscles become agitated and pump an excessive amount of blood. B) the ventricles do not have enough time to refill with blood, so stroke volume decreases. C) the heart muscles become tired and are unable to pump as much blood. D) the ventricles are filled with too much blood, so stroke volume increases.
Which of the following statements regarding normal gas exchange in the lungs is correct?
A. The oxygen content in the alveoli is highest during the exhalation phase. B. Oxygen and carbon dioxide diffuse across the alveolar walls and capillaries. C. The actual exchange of oxygen and carbon dioxide occurs in the capillaries. D. Blood that returns to the lungs from the body has a low carbon dioxide content.