Why would decreased saliva lead to tooth decay?
a) Saliva lubricates and mixes ingested food, allowing it to be swallowed quickly and preventing tooth decay.
b) Saliva contains bicarbonate ions, which increases the acidity in the oral cavity, preventing tooth decay.
c) Saliva helps to moisten and cleanse the oral cavity and contains lysozymes and IgA to kill pathogenic bacteria, preventing tooth decay.
d) Saliva contains salivary amylase which initiates the digestion of proteins in the food and bacteria in the oral cavity, preventing tooth decay.
Ans: c) Saliva helps to moisten and cleanse the oral cavity and contains lysozymes and IgA to kill pathogenic bacteria, preventing tooth decay.
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