White blood cells, or ____, function as part of the immune system to react to foreign challenges.
A. erythrocytes
B. thrombocytes
C. leukocytes
D. lipoproteins
Answer: C
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The most important variable affecting trigger asynchrony is:
a. the mode of mechanical ventilation being used. b. the tidal volume being delivered. c. the presence of auto-PEEP. d. the patient's underlying disease process requiring mechanical ventilation.
Which law requires that all drugs be approved by the FDA prior to marketing?
a. Food, Drug, and Cosmetic Act b. Comprehensive Drug Abuse Prevention and Control Act c. Omnibus Budget Reconciliation Act (OBRA) d. Fair Packaging and Labeling Act
Which one of the following statements is TRUE about conjugate vaccines?
a. Conjugation changes the immune response from T cell-independent to T cell-dependent, leading to increased immunogenicity in those < 2 years of age. b. Immunogenicity of a protein antigen is improved by chemically linking the protein to a polysaccharide. c. The antibodies produced by a conjugate vaccine are primarily IgM. d. Conjugate vaccines stimulate B cells without the help of T cells.
As a professional radiographer, the practice of ALARA requires you to
a. employ high ratio grids. b. use low mAs , high kVp exposure techniques. c. use the largest receptor possible in order to get a higher-quality image. d. restrict the x-ray beam to the clinical area of interest.