Which of the following statements about subgingival plaque are true?

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

The color of the gingiva is dependent upon vascularity plus 

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 width of attached gingiva is determined by subtracting the sulcus depth from the total width of keratinized gingiva.  

Which of the following stages of gingivitis is the earliest clinical evidence of gingivitis?

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

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

The principal antibody in tears and saliva is    

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