Each of the following statements regarding vertical angulation is correct EXCEPT one. Which one is the EXCEPTION?
a. The correct vertical angulation for bitewing radiographs is +10 degrees.
b. Vertical angulation is indicated on a dial on the side of the tube head.
c. Negative angulation directs the central ray downward toward the floor.
d. Vertical angulation is measured in degrees.
c. Negative angulation is the positioning of the central ray upward toward the ceiling.
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Thrombin is an enzyme that converts fibrinogen into an elastic protein. This elastic protein is very important in the clotting process. What is this elastic protein called?
A. White blood cells B. Hemostasis C. Prothrombin D. Fibrin
A patient has a hematocrit of 65%. Which of the following is true related to coagulation testing?
a. Hematocrit does not affect coagulation testing. b. Tube must be recollected with heparin as the anticoagulant. c. Tube must be recollected using 0.34 mL of sodium citrate to 4.5 mL of blood. d. Tube must be recollected using 0.62 mL of sodium citrate to 4.5 mL of blood.
Selection involves which of the following processes?
A. reference check and background check B. personal interview C. selection test D. all of these are part of the selection process E. none of these are part of the selection process
Which gases are exchanged in the capillaries?
A. Potassium and carbon monoxide B. Oxygen and carbon dioxide C. Nitrogen and helium D. Nitrogen and argon