A 60-year-old man complains of chest pain. He is conscious and alert and denies shortness of breath. Which of the following questions would be the MOST appropriate to ask him?
A. "Were you exerting yourself when the chest pain began?"
B. "Does the pain in your chest move to either of your arms?"
C. "Does the pain in your chest feel like a stabbing sensation?"
D. "Do you have any heart problems or take any medications?"
Answer: D. "Do you have any heart problems or take any medications?"
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The black-topped tube used to determine the erythrocyte sedimentation rate contains which of the following additives?
A. Potassium citrate B. Sodium heparin C. Sodium citrate D. EDTA
By which of the following routes does blood flow through the umbilical cord between the pla-centa and the fetus?
a. One umbilical vein and one umbilical ar-tery b. One umbilical vein and two umbilical ar-teries c. Two umbilical veins and one umbilical ar-tery d. Two umbilical veins and two umbilical arteries
Which of the following substances is released from Gram-negative cell walls?
A) Exotoxin B) Collagen C) Lipooligosaccharide D) Biofilm
The temperature of the laboratory refrigerators should be maintained between ________.
A. 50°F and 56°F B. 24°F and 28°F C. 10°F and 15°F D. 36°F and 46°F E. 60°F and 65°F