are acidic and destroy tooth enamel are acidic and destroy the gingiva are conve

Question

       are acidic and destroy tooth enamel
       are acidic and destroy the gingiva
       are converted to acids by bacteria; the acid then destroys tooth enamel
       are converted to acids by bacteria; the acid then destroys the gingiva
       are converted to acids by bacteria, which then kills the bacteria to release lipid A

       destruction of liver cells by virus
       cellular immune reactions against infected liver cells
       exotoxin production
       endotoxin production
       its DNA genome

Explanation / Answer

1) Diets high in sugars and starches increase the risk of tooth decay because these : are converted to acids by bacteria; the acid then destroys tooth enamel.

**The diet provides sugars and other fermentable carbohydrates/starch, which are metabolized to acids by plaque bacteria. The resultant low pH favors the growth of the acidogenic and aciduric bacteria (mutans streptococci). In contrast, a diet lower in added sugars and fermentable carbohydrates and high in calcium-rich cheese may favor remineralization. Sucrose facilitates the colonization of teeth by mutans streptococci and their outgrowth.

2) Most of the symptoms associated with hepatitis are due to destruction of liver cells by virus (most probable answer)

**Classic models of hepatitis C suggest that cellular immune responses promote liver injury, either by causing direct cytolysis of infected cells or by promoting inflammation.

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