Select the best statement from the following choices to describe the pathogenesis of PNH
a. Increased hemolytic episodes are produced as a result of complement binding to erythrocytes via IgG antibodies in cold temperatures.
b. Increased hemolytic episodes are produced as a result of missing cell membrane proteins that regulate complement activation.
c. Increased hemolytic episodes are produced as a result of missing enzymes necessary for ATP production in erythrocytes.
d. Increased hemolytic episodes are produced as a result of initiation of an immune response against erythrocytes.
Correct Answer: B
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a. AIDS b. hepatitis B c. polio d. mumps
Caries that occurs under a restoration or around the margin of an existing crown is referred to as which type of decay?
dentinal caries buccal caries root caries recurrent caries