Which of the following screening tests would be normal when the plasma for the patient in Question 26 is
a. PT
b. PTT
c. TT
d. All of the above
ANS: D
The PT, PTT, and TT are all normal in a patient with factor XIII deficiency. Factor XIII deficiency is evaluated by placing the clot in 5M urea; the uncross-linked clot is weak and dissolves within 2 hours in this solution.
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When a gravel surface is used to protect a roof from mechanical abrasion, it also:
A) increases the insulation between the outside and inside of the building. B) increases the resistance to ignition by flaming brands from adjacent buildings. C) decreases the movement of water, hampering drainage. D) helps diffuse interior moisture into the insulation layer.
In the early 2000s various publications calculated individual and population risks of cancer from CT based upon risk estimates from studies of which of the following groups of people?
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