Which of the following instruments generally has a check source of a weak, long-lived radioisotope located on one side of its external surface to verify its constancy daily?
a. Pocket dosimeter
b. Proportional counter
c. Geiger-Muller survey meter
d. Ionization chamber-type survey meter
c. Geiger-Muller survey meter
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Which of the following is true about a Berman airway?
a. It has a central channel. b. It is smaller than a Guedel airway. c. It must be inserted upside down. d. Its shape is similar to that of a Guedel airway.
All of the following statements are true EXCEPT:
a. Gray-stoppered tubes are used for blood glucose tests. b. Gray-stoppered tubes are used for CBC and WBC tests. c. Lavender-stoppered tubes are used for CBC, WBC, and platelet testing. d. Red-stoppered tubes are used for many tests, including serum enzyme testing.
Fibrinolysis is mediated by:
a. heparin. b. fibrinogen. c. plasmin. d. albumin.
What causes discrete black lines to appear on the radiograph?
What will be an ideal response?