All of the following are true of positive beam limitation (PBL) EXCEPT:
a. PBL automatically collimates the beam.
b. PBL senses the size and orientation of the receptor.
c. PBL is possible with portable radiography.
d. PBL may be overridden by the radiographer in select instances.
c. PBL is possible with portable radiography.
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The plasma membrane of blood cells is characterized by which of the following?
a. Carbohydrate components (glycolipids, glycoproteins) embedded in the lipid bilayer b. The asymmetric distribution of the phospholipids c. The hydrophilic ends of the phospholipids directed toward the inside of the lipid bilayer d. The absence of peripheral proteins
A suction catheter long enough to reach a mainstem bronchus should be what length?
a. 22 cm (8.7 inches) b. 25 cm (9.8 inches) c. 46 cm (18 inches) d. 56 cm (22 inches)