Which one of the following types of pocket has its base located apical to alveolar crest as evidenced on a radiograph?

Which of the following statements about subgingival plaque are true?

During a periodontal examination a 6 mm pocket is detected on the direct facial surface of tooth #19. The gingival margin is located at the CEJ. What type of pocket is this?

When the alveolar crest appears to be parallel to a line drawn between the cementoenamel junctions of adjacent teeth, reduction in height of the interdental septum is known as which of the following:

A series of proteins circulating in the blood that work to facilitate phagocytosis or kill bacteria directly by puncturing bacterial cell membranes is known as:    

The color of the gingiva is dependent upon vascularity plus 

Long, fine, wavy filamentous structures that are used for motility

The principal antibody in tears and saliva is    

Tobacco use is related to an increased risk for severe periodontal disease. Smokers have a diminished neutrophil function.

A bacterial product that attracts leukocytes to an area of irritation is